Light Review: FOURSEVENS Preon P1 Copper Limited Edition

FOURSEVENS’ Preons have been very popular and well regarded AAA powered EDC lights. After their latest reboot (previously reviewed), this is the special edition solid copper version. Grab one while you can here and don’t miss out on the copper goodness.

Taking a more detailed look:

Unlike the standard edition Preons, the Copper version does not come in a clear plastic box, instead it comes in a presentation cardboard box.

The contents are nicely laid out.

Included are the Copper Preon P1 (in a protective plastic case), a Duracell AAA cell, and the instructions. That plastic protector is to ensure that the Copper P1 arrives while still a Copper colour. The patina and darkening can then develop over time as you use it.

The Copper Preon is exactly the same in design, dimensions and machining as the standard P1, just made of solid Copper instead of aluminium.

Every part that was aluminium in the standard version is Copper, including the switch button cap.

Taking a closer look at the bare Copper machined surface.

With the small reflector and XP-L LED, the Preon P1 is set for an excellent EDC beam.

The XP-L LED and textured reflector.

With the head removed (for inserting the battery) the contacts can be seen.

The threads are standard and cleanly cut.

Shining another Preon down the battery tube allows us to see the negative spring contact.

FOURSEVEN’s logo is engraved on the switch button cap.

The beam

Please be careful not to judge tint based on images you see on a computer screen. Unless properly calibrated, the screen itself will change the perceived tint.

The indoor beamshot is intended to give an idea of the beam shape/quality rather than tint. All beamshots are taken using daylight white balance. The woodwork (stairs and skirting) are painted Farrow & Ball “Off-White”, and the walls are a light sandy colour called ‘String’ again by Farrow & Ball. I don’t actually have a ‘white wall’ in the house to use for this, and the wife won’t have one!

Starting indoors with the P1, it has plenty of power for your close range EDC needs, with a nice wide, soft, hotspot and wide spill.

At outdoor ranges the Preon struggles as it is only a single AAA powered light and has a flood orientated beam. These exposures are long to show anything. The P1 doesn’t have much impact.

Modes and User Interface:

Just as with both the standard Preon P1 and P2, the special edition Copper P1 operates in the same way with a forward-clicky switch.
In total, there are 7 output modes which can be used – Low, Medium, High, Strobe, SOS, Beacon (high), Beacon (low).

To fine tune the Preon to your needs, you can set one of 5 possible ‘Configurations’ which have only certain modes available:
Configuration 1: High
Configuration 2: Previous, High, Low
Configuration 3: Previous, High, Strobe
Configuration 4: Previous, Low, Medium, High, Strobe
Configuration 5: Previous, Low, Medium, High, Strobe, SOS, Beacon (high), Beacon (low)

By default, configuration 2 is set. To change configuration, rapidly press the switch 10 times within 2s, holding or clicking the tenth press.
At this point the Preon will flash 1 to 5 times to indicate the selected configuration.
Quickly turn the Preon OFF and ON again to move to the next configuration, and repeat until you have the desired configuration. To memorise the setting, turn the Preon OFF for 5 seconds.

The Preon has a memory of the last mode used. This is relevant only on Configurations 2, 3, 4 and 5.
To change to the next mode in the chosen configuration, turn the Preon OFF and ON again within one second.
As shown in the Configuration list above, when you first turn the Preon ON, you get the ‘previously used’ output mode. When you then change mode, you jump to the start of the set of modes for that Configuration.
For example, if you are set to Configuration 5 and previously used Strobe, when you first turn the Preon ON you get Strobe, and when changing modes the next mode becomes Low, Medium… (In this example you do not go to SOS as the next mode).

Batteries and output:

The Preon P1 runs on AAA Alkaline or NiMh.

To measure actual output, I built an integrating sphere. See here for more detail. The sensor registers visible light only (so Infra-Red and Ultra-Violet will not be measured).

Please note, all quoted lumen figures are from a DIY integrating sphere, and according to ANSI standards. Although every effort is made to give as accurate a result as possible, they should be taken as an estimate only. The results can be used to compare outputs in this review and others I have published.

___________________________________________ ________________________________ ________________________________
Preon P1 Cu using specified cell I.S. measured ANSI output Lumens PWM frequency or Strobe frequency (Hz)
___________________________________________ ________________________________ ________________________________
High 97 1000
Medium 50 1000
Low 7 1000

* Beacon and Strobe output measurements are only estimates as the brief flashes make it difficult to capture the actual output value.

Peak Beam intensity measured 200 lx @1m giving a beam range of 28 m.

There is no parasitic drain.

The Preon P1 Cu exhibits the FOURSEVENS ‘Burst Mode’ behaviour. When on maximum output the first three minutes are at a higher output before dropping to a slightly lower level for the remainder of the runtime.


This section is included to mention any minor niggles I come across during testing, in case the information helps anyone else.

No issues were encountered during testing.

As per the description of this section, this information is provided in case anyone else finds a similar ‘issue’ that might be fixed in the same way.

The FOURSEVENS Preon P1 Copper in use

If you have read my other Preon review, then this will be mostly the same as the light is the FOURSEVENS Preon, just in a lovely raw Copper. I’m including the impressions of the current Preon as they are just as relevant to this special edition as the standard ones.

When compared to the previous generation Preons, these new versions are slightly chunkier, and initially I was not entirely convinced, as the point of an AAA light is to be very small. But then I remembered that as much as I love the older Preons they were always a bit slippery. The smooth body wanting to slide around and not giving much of a grip.

With the new Preons having a grip pattern over the entire length of the light, no longer do you get this slippery feeling. One further observation though, is that these grooves tend to pick up pocket fluff nicely, which does somewhat spoil the look.

Personally I preferred the previous UI where it had no memory, but for some a memory is a requirement as you can pre-select the output you generally use. However, as the memory only affects the mode at switch-on, after which the mode selection goes to the first of the modes in the current Configuration, it only takes one mode change to return to Low.

Unfortunately another aspect has changed in the new version, PWM is rearing its head. The previous Preons had PWM but at 2500Hz and was not noticeable to the naked eye; the new version has PWM at 1000Hz. On High and Medium this has not really been visible, but on Low, I do catch the strobing effect out of the corner of my eye. A minor irritation and not what I would expect of FOURSEVENS. It slightly takes the edge off what could be a great update to this well loved series.

It used to be more common for smaller EDC lights to go with a reverse-clicky switch, but as in earlier versions, the Preon does use a forward-clicky and gives you that immediate response to pressure on the switch.

A great feature that has been added to the Preons is the user-changeable configuration that allows you to limit which output modes can be selected. You don’t get to choose which modes are included in a ‘configuration’ but you can choose one of the five available ‘configurations’ to best suit your needs. This user configuration has great potential and I hope FOURSEVENS expand the number of configurations that can be chosen from.

With the small power source of AAA, the added efficiency of the XP-L (though only around 9%) makes a difference. Thanks to the XP-L having an XM-L2 size die in a smaller package, it is compact enough to be fitted into the Preon’s head and provide a great EDC beam.

The new Preon doesn’t just have a new body design, it has user-configuration and an XP-L LED, and in this special edition version you have a solid Copper body that with age and develop it own unique and attractive patina.

Review Summary

_______________________________________________ _______________________________________________
Things I like What doesn’t work so well for me
_______________________________________________ _______________________________________________
It’s Solid Copper. PWM at 1000Hz giving some strobe effects on low.
XP-L LED in a truly pocket-sized light. Copper marks easily and tarnishes.
User configurable. Copper is heavier.
Great EDC beam.


Discussing the Review:

The ideal place to discuss this reviews is on a forum. If you started reading the shorter forum version of the review, but followed the link this full exclusive review, please return to that forum to discuss the review there.
If you read the review entirely on Tactical Reviews, please consider one of the following to join in any discussion.

CandlePowerForums – Flashlight Reviews Section (Largest and Friendliest Flashlight Community Forum)

EdgeMatters – Sponsored Reviews (UK based Forum for Knife Makers and Collectors)

Knife Review: Morakniv Eldris with Fire Starter

In the third of a series of reviews looking at Morakniv’s latest models, we meet the Eldris, a fixed blade knife that is so easy to carry, Morakniv call it their ‘folding knife’.

 photo 11 Eldris full unsheathed P1240579.jpg

The Blade and Handle Geometry:

Most knife specifications have a basic description of the blade geometry, but in this section I will be taking a more detailed look at geometry and balance.
 photo 23 Eldris grind P1250028.jpg

Using a set of gauges and precision measuring equipment including a Vernier protractor, callipers, fixed radius gauges and the unique Arc Master adjustable radius gauge (the one that looks like a crossbow).
 photo Knife measuring P1180483.jpg

These measurements have been tabulated and are presented along with a few reference blades (8″ Chef’s Knife, 5.5″ Santoku and the popular Fällkniven F1).

Key aspects such as the primary bevel angle, grind type, blade depth, blade thickness, length, weight are detailed, along with balance information.
 photo 22 Eldris bevel P1250024.jpg

The ‘Balance relative to the front of the handle’ tells you if the knife will feel front heavy, or if the weight is in your hand (a positive value means the weight is forward of the front of the handle). The ‘Balance relative to the centre of the handle’ indicates how close to a ‘neutral balance’ the knife has in the hand.
 photo 21 Eldris balance P1250021.jpg

In the case of full convex grinds the approximate centre of the grind is used for the primary bevel angle estimate.
 photo Eldris parameters.jpg

The blade is made from 12C27 Swedish Steel.

Explained by the Maker:

The reasons for certain design choices may not be clear when simply looking at an object, so this section is intended to give an insight into the thinking behind a design by speaking to the designer themselves.

Unfortunately I can’t always get time with the designer so will use this section to include relevant information about the knife and its designer.

This is an interview with ‘Head of Production’ at Morakniv, Thomas Eriksson, from IWA 2017 by Tactical Reviews.
The discussion includes how the factory edge is created, maintained and also includes micro-bevels and zero-grinds. It is 16 minutes long, so you might want to come back to this after reading the rest of the review.

Video Edited with – Cyberlink Director Suite 5 (PowerDirector 15 and AudioDirector 7)
Camera – Panasonic HC-V770    Microphone – Tonor TN120308BL and/or Takstar SGC-598

A name that tells a story – Eldris…

The traditional summer grazing land (‘fäbodar’) for the village on the opposite bank of the river from the Morakniv factory is named Eldris. During the summer time the people from the village lived on the ‘fäbod’ and used only what nature had to offer.

“To name our pocket size knife Eldris after the place and the people who lived there is our way of paying tribute to our roots. Our ancestors and the surroundings of Mora are all parts of who we at Morakniv are today. The Eldris knife – the flexible companion when doing everything from crafting to lighting the evening fire – is our interpretation of the life once lived at the ’fäbod’ of Eldris.”

“The Eldris knife has been in our minds for a long time, the small knife that fits easily in your pocket or hanging around your neck. Most times the modern outdoor life doesn’t need much more than this knife. You could say that this is our interpretation of the folding knives that are very popular today, but Eldris has the advantages of the rigid features of a fixed blade” – Arvid Larsson, Design Engineer.

 photo 18 Eldris fan P1250008.jpg

“The colours of Eldris are inspired by our surrounding region and our history. The black of coal is never far away if you go out in the forests around Mora. Suddenly you’ll happen upon an old charcoal pit or the remains of one. The well-known Dala red (or Falu red) colour gets its pigments from the Falu copper mines. Since as far back as the 1700s, the familiar red-painted houses with white frames have spread across the country and become an international symbol for Sweden and the county of Dalarna.
As well as the Dala red colour, we also have a Dala blue, which can be seen on everything from building details to clothes. It’s even in our regional coat of arms, together with the crossed arrows and the royal crown. The moss green colour is inspired by the nature and unique surroundings of the area around Lake Siljan. Deep in the forests we find the calm and inspiration for this green hue. Finally, we have the golden ocher colour, taken from the Dalarna paintings of the 1600’s, and also the folk costumes that people in Mora have worn since time immemorial.”

 photo 20 Eldris fan P1250014.jpg

A few more details:

The five different colours of the Eldris. The fire-starter optional kit is attached to the bottom of Eldris knife box.
 photo 01 Eldris boxed set P1240528.jpg

For the fire-starter kit version of the Eldris, this is the full set of components. The Eldris knife and sheath, security strap, length of cord and ferrocerium rod with leather tab and cord loop.
 photo 02 Eldris box contents P1240549.jpg

As the bare knife and sheath, the Eldris becomes a pocket knife, small and streamlined and easy to pop in a pocket.
 photo 03 Eldris basic P1240551.jpg

Moulded into the sheath are the Morakniv logo and crossed arrows of the Swedish province Dalarna.
 photo 04 Eldris logo P1240552.jpg

On the back of the sheath are the hollows for the security strap ring to clip into.
 photo 05 Eldris made in P1240556.jpg

The security strap consists of a plastic ring which clicks into place on the sheath with a leather strap that uses a press stud to secure the strap in place.
 photo 06 Eldris lock strap P1240557.jpg

Looking inside the security strap ring, you can se the lugs that click into place in the corresponding hollows on the sheath.
 photo 07 Eldris lock strap inside P1240560.jpg

Adding the security strap adds very little bulk to the Eldris.
 photo 08 Eldris lock strap fitted P1240568.jpg

At the tip of the sheath are two holes which can be used for fitting the neck lanyard and also act as drainage holes.
 photo 09 Eldris sheath holes P1240571.jpg

For use as a pendant knife you can also fit the fire-rod onto the neck cord.
 photo 10 Eldris full sheathed P1240577.jpg

The Eldris is a small knife and being a fixed blade is more reminiscent of a wood carver’s tool.
 photo 13 Eldris in hand P1240589.jpg

However, you can get a strong grip on it thanks to the handle still having enough bulk (unlike most pendant/neck knives).
 photo 14 Eldris in fist P1240594.jpg

Full Scandi-grind blades are often not so good for slicing due to the full blade thickness being maintained for the majority of the blade depth. In the Eldris, similar to Morakniv’s Kansbol, there is additional profiling for the front half of the blade which thins down the blade making it a better slicer. As a super compact all-rounder, it really helps that Morakniv have included this extra profiling.
 photo 16 Eldris blade P1240604.jpg

Also note, the factory edge micro-bevel which is described in the video.
 photo 15 Eldris blade P1240598.jpg

There is no choil or ricasso, with the blade edge going all the way into the handle.
 photo 17 Eldris handle blade P1240605.jpg

What it is like to use?

The principle that Morakniv have aimed for with the Eldris is to bring together the features and advantages of a pocket size knife but with a fixed blade instead of a folding one. A smaller knife is not only easier to carry, but gives you increased control when using it, and is safer to handle than a larger one.

By choosing a fixed blade, the design is more durable and better suited to rough use than a folding knife. Yet when the knife is sheathed, it is still small enough to be easily carried in a pocket.

It is no surprise that the Eldris features a Scandi-grind, and this makes it well suited to working with wood as well as making it easy to keep sharp. Having given the Eldris a good workout, here I’ve given it a quick touch up on a stone and then a strop.

 photo 25 Eldris sharpened.jpg

After the quick maintenance, it was falling through paper.
 photo 26 Eldris sharpness.jpg

In the case of the Eldris Fire Starter Kit, a fire-rod is included. Of course you can provide your own fire-rod and just make use of the ground spine which has sharp corners and is ideal for striking sparks from the ferro-rod. No need to carry a separate striker or (horror) use the edge to strike sparks.

There is one design aspect we must dwell on; the handle. The symmetrical handle makes this an ambidextrous knife as it allows a two-way fit into the sheath. The drop-shaped design is big enough to keep the knife securely in your hand yet allows you to move your hand around on the handle for many different kinds of grip. The outer part of the grip is TPE, a rubbery polymer that provides a secure grip, and the core of the handle is made of much tougher polypropylene. Morakniv are very proud of their heritage and express this in aspects of the design. In this case, the rhombus pattern is a traditional pattern used in Mora and the region of Dalarna, and as well as helping with grip, it also pays a tribute to Morakniv’s region and history.

Having seen very early versions of the Eldris where the click-lock had not been finalised, the final level of sheath retention Morakniv have built into the Eldris is excellent, and is very unlikely to come loose by accident. However, especially for when wearing inverted around your neck, the secondary locking strap absolutely prevents the knife from falling out of the sheath. When carrying in your pocket or a bag, you might not want the secondary lock and the plastic collar can be removed, making the Eldris even more compact.

Knives this compact and light are generally only suited to very light tasks with handles that can’t be used for long before they become fatiguing or painful. The Eldris has a big enough handle that you can get a strong grip, a grip which you can work with for longer periods. Combining this usable handle with a blade length that is sufficient for most typical cutting tasks, and it gives you a really easy to carry fixed-blade pocket knife.

 photo 24 Eldris bark P1250229.jpg

I would not go so far as to call it a folding knife, but it really is a pocket knife – with a fixed blade.

We can love blades of all sizes, and I can’t resist the biggest of blades, but taking into account your actual needs and the ‘cost’ of the weight you have to carry with larger blades, the Eldris makes a huge amount of sense.

Unless you are doing some heavy chopping or batoning, the part of the cutting edge you are likely to use the most, is that part you can apply maximum pressure to – the section of blade closest to the handle. This is exactly what the Eldris has.

Never a fan of the ‘neck knife’ (nor of the term), the Eldris has won me over and become a regular companion, frequently round my neck!

Review Summary

The views expressed in this summary table are from the point of view of the reviewer’s personal use. I am not a member of the armed forces and cannot comment on its use beyond a cutting tool or field/hunting knife.

Something that might be a ‘pro’ for one user can be a ‘con’ for another, so the comments are categorised based on my requirements. You should consider all points and if they could be beneficial to you.

_______________________________________________ _______________________________________________
Things I like What doesn’t work so well for me
_______________________________________________ _______________________________________________
Pocket-sized fixed-blade knife. Relatively expensive compared to other Morakniv models.
Secondary locking strap. You will want more than one.
Can be worn round the neck or carried in a pocket.
Comfortable handle.


Discussing the Review:

The ideal place to discuss this reviews is on a forum. If you started reading the shorter forum version of the review, but followed the link this full exclusive review, please return to that forum to discuss the review there.
If you read the review entirely on Tactical Reviews, please consider one of the following to join in any discussion.

EdgeMatters – Sponsored Reviews (UK based Forum for Knife Makers and Collectors)

BladeForums – Knife Reviews (US based Forum for Knife Discussion)

CandlePowerForums – Knife Reviews Section (Largest and Friendliest Flashlight Community Forum)