FUNLEADER Contax G35 F2 to Leica M Conversion review

pptmstr

Member
Local time
9:53 AM
Joined
Aug 25, 2018
Messages
35
Location
Vancouver BC, Canada
FUNLEADER Contax G35 to Leica M Conversions
(affiliate link)

LDCwjgN.jpeg


Hello everyone, here's my review of the new Contax G 35mm f/2 FUNLEADER conversion to Leica M. I have included the 7artisans 35mm f/1.4 M and the Voigtlander VM 40mm f/1.2, the only lenses in the 35mm zone I own.

0UoKdEg.jpg


Disclaimers:
1. none of the lens makers / converters have been involved in these tests and I have personally purchased all 3 lenses, none of them have been provided.
2. all opinions expressed here are my own and, just like with anything in life (especially photography equipment!), you may have a different one.

A few bullet points about the tests:
- done on my Leica M-P typ 240
- done on a tripod with a 2 second timer to hopefully dampen most vibrations
- no filters or hoods were used and lenses were extremely clean
- captured at M-P's base ISO: 200 (with the exception of a few frames captured at 1.2 and 1.4 because 1/4000 was too slow to keep equal exposures so I set the ISO to PULL 100)
- exposure was manual and the exposure time was adjusted accordingly with every aperture change (generally 2/3 stop) in order to hopefully maintain an even exposure between the samples
- white balance was on AUTO
- all focus was EXTREMELY CAREFULLY done using LIVE VIEW at f/2 for each lens, using both the focus peaking and my own eyes to make sure I get the best possible focus
- focus was redone with every lens change
- the 40mm was repositioned so that the main subject filled roughly the same size in the photos (as much as possible, the infinity tests obviously show the difference in focal length)
- most tests were taken all all apertures but since this ended up requiring so much work I only included up to f/8, to be honest I don't think anything past that is relevant
- all samples processed in Capture 1 PRO with the default output sharpening for screen (any image processor will apply some sort of sharpening from DNG to JPG)
- I am sharing a Google Drive folder with all DNGs, JPGs, comparisons and misc images, all full size. Please check them out and use them for free, a credit would be nice if you end up posting them.

PART 1 / 6

A morsel of history: if you're reading this you most likely know what this lens is, otherwise this info can be easily found online.

The G35/2 is supposed to be the "lesser performer" of the Contax G suite, the internet is funny like that, some person deemed it once as not being as stellar as the G45/2 (which is whispered to be one of the best lenses in 35mm photography history) and the internet has taken that and transformed it into "not a good lens" kind of rumour. I am here to prove otherwise.

Here's a G35 / G45 specs comparison:

uWKdRoR.jpg


This 35 together with the Hologon 16mm are the only ones I do not own in G mount. I have shot all the other ones (21/2.8, 28/2.8, 45/2, 90/2.8) on my Contax G2 and adapted on my Sony A7R3 with a cheap Ulata adapter. They are sharp, very sharp wide open. And so light.

Build quality: without further ado, I think FUNLEADER and Mr. Ding have done an amazing job here: the conversion is incredible, so tiny and lovely, with a great weight and feel. The focus action is nice and smooth and the little focus tab suits the lens. The black paint version is really beautiful, I have always been a black paint / lacquer fan, hence my M-P. This version will get patina with use (unless you're Lenny Kravitz and give it a good rub to look well used). The "gold" version has lovely sharp black engravings and a black focus tab. The focus tabs are really nice, placed at the perfect position where, when pointed straight downwards, the lenses focus at 4 feet / 1.2 meters. I also purchased a "gold" helicoid as I am planning to do a conversion myself. The "gold" helicoid feels like brass and it's a bit of a fingerprint magnet.

The helicoid has "MR. DING" engraved on the mount. Pretty cool. I did a bit of digging and "Mr. Ding" is their master craftsman, maybe having been part of MGR Production. They are also behind the Bresson Viewfinder magnifier, which I happen to have on my M-P and love.

I would love to find out more about Mr. Ding, if anyone has info please do share.

g0nIkI7.jpg


The weight of the helicoid is 206g / 7.26oz and the whole lens is 266g / 9.38g

n4wK1CS.jpg


The lens did have a plastic ring glued on the front, on top of the original Carl Zeiss from markings, but I removed it easily and left no marks. Sorry Mr. Ding, I prefer the original Carl Zeiss engravings.

The original lens hood of the G35 / G45 fits nicely, but I have the champagne version and I personally don't think it works with either the black or the gold version. I might spray paint it with a glossy enamel.

Honestly, it looks amazing on the M-P. It is a gem of a little lens and a great performer.



Customer service: excellent, very responsive, I had quite a few questions for them and they replied very quickly.

Packing: excellent, pragmatic, not fancy.

Shipping: wowsers, the lens was in my hand in Vancouver BC Canada in 6 days, dayum!
 
Last edited:
PART 2 / 6: sharpness close and mid distance

Before we dive into the sharpness chapter, I wanted to add 2 notes about colour and focal length:

- colour - the G35/2 render the most accurate and neutral colours, next is the VM 40/1.2, while the 7artisans 35/1.4 M renders quite warm
- focal length - the G35/2 is a little wider than the 7artisans 35/1.4 M, I wonder what their real focal lengths are. Please do share if you happen to know.

Sharpness: the G35/2 is very sharp wide open, it nearly matches the VM 40/1.2 at f2, actually honestly we are splitting hairs between the G35/2 and VM 40/1.2. Keep in mind that the VM starts at 1.2, so from a lens design pov it has a lot of room to be sharp at f2. It's quite a feat how consistent the G35/2 is all the way up to the widest apertures. The G35/2 is sharper than the 7artisans 35/1.4 M at every aperture. I was surprised as well. In all honestly, I really love the 7artisans lens, it has a really nice 3d pop and the built is absolutely amazing.

Check out these 100%s of this starling at f2! I used live view, there's no way to nail that in the viewfinder patch, I also took a bunch of shots and these were the best 4, maybe out of 12 or so.

100%
nSlYZek.jpg


full images for context
2adIJ8y.jpg


I have done a few test sessions but not included all here (so much to process and compare), so here are a few. Before every comparison chart you will see a half size G35/2 image at f2, for no reason really other than to show you what the whole scene looked like.

Session 1 close:
5dPo2Ed.jpg

d77Mlrb.jpg


Session 1 mid distance:
TaK8Fqt.jpg

cQyH31f.jpg


Session 4 close:
CwUeiFu.jpg

Ij9Yte3.jpg


Session 4 mid distance:
pOkJmbK.jpg

7UBJg9G.jpg


Session 5 close:
zO1ThlH.jpg

6QpRh5F.jpg


Session 6 close:
hUvyOhx.jpg

EYpFaJ3.jpg
 
Last edited:
PART 4 / 6: bokeh and conclusion

Session 1 mid distance:
TaK8Fqt.jpg

9kBCpBw.jpg


Session 2 mid distance:
cUTApuZ.jpg

ob1Byvy.jpg


Session 6 close:
hUvyOhx.jpg

wprA1v9.jpg




Vignetting: yea a bit, but nothing out of the ordinary at large apertures. See for yourself.


Focus shift: I did not test for it, but from my walks it seems to be fine.


CONCLUSION:

The Carl Zeiss Contax G 35mm f/2 is a gem. Coming from great heritage, it is now encased in an amazing conversion from FUNLEADER for our Leicas. The G35/2 is an honest lens, you won't find clinical sharpness here, but since you're reading this you're probably not looking for that, but for the resurrection of a highly underrated Carl Zeiss optic. The G35/2 renders the world gently with neutral colour rendition, pleasant bokeh and a sprinkle of pop. The tiny form has a great weight and feel and it simply looks incredible on a Leica. The black paint version is shiny and will brass while the "gold" version has lovely sharp black engravings (bit of a fingerprint magnet though). I honestly look at my camera sitting on my desk now and hear the whispers: "take me out and make photographs". Well done FUNLEADER and Mr. Ding, hat's off to you.

Just like the original little piece of history it now protects and focuses, the FUNLEADER conversion will also be remembered as a gem amongst the connoisseurs.

FUNLEADER Contax G35 to Leica M Conversions
(affiliate link)

I hope you enjoy the test results, please let me know if you have any thoughts, suggestions and questions.

Here is the Google Drive folder:
https://drive.google.com/drive/folders/1-mgIUEIScjebkdNY-GAouTlJE3FTCrDy

I am leaving you with a bunch of samples, enjoy.
 
Last edited:
PART 5 / 6 samples 1 / 2

All the following samples are just snaps from my walks and I barely spent a minute on some of them in C1 🙂

f2
sfsqzzU.jpg


f5.6
bZzcosU.jpg


f8
nteROvz.jpg


f2
lkvteUP.jpg


f2
uOb1mHc.jpg


f2
D9CPI5g.jpg


f5.6
iEC0Qc2.jpg


f5.6
broaiJs.jpg


f2
Xpbirva.jpg


f2
XsWyQov.jpg


f2
rL9EfXX.jpg


f2
wV1xJTO.jpg


f2
oXy6Lps.jpg


f2
NvcO9wU.jpg
 
Last edited:
Nice! Cant wait to see my results. I've been lagging on developing my roll. I still have 10 frames left, and don't wanna just burn them. I just got my rolleiflex back from a CLA, so that has all my curiosity right now. Thanks for doing some comparisons. Question, the shot at infinity that's on top of the comparison grid. Is that wide open? If so, did it perform that badly on the contax g bodies that badly at infinity wide open?
 
Pptmstr, thank you for this vigorous test. It's a lot of work you've done there.
I have the Zeiss 35 in G mount and the CV 40/1.2 so this is very interesting for me.
 
wow; thanks for the intensive review.

i now have 3 35mm lens, in which 2 are Leica authentic and one is LLL replica.

don't know if i should add another Contax G lens. Never use Carl Zeiss before.

your test shows stellar performance of the Contax 35/2
well done.
 
Wow!! What a great series indeed. The Contax and VM appear to clean up nicely by f/4 while the 7A lags until f/5.6.
Despite its age, the Contax really shows impressive performance at f/2. The VM 40 proves itself as an 'atmospheric lens' for special applications. The 7Artisan, well, WYSIWYG for US$429.

wow; thanks for the intensive review.

i now have 3 35mm lens, in which 2 are Leica authentic and one is LLL replica.

don't know if i should add another Contax G lens. Never use Carl Zeiss before.

your test shows stellar performance of the Contax 35/2
well done.

You essentially have lenses of the same design philosophy, the last of the list a well-appointed poseur. The Zeiss is a whole other beast, though personally would take the leap with a native-mount ZF instead. Perhaps not as small but small enough (35 Biogon C would be my choice).
However, if the Contax really intrigues you, the 45 is the one that truly stands out.
 
Thanks for the nice words everyone! It was indeed a little overwhelming to manage all that data and get the comparisons together but now I have my flow going so I can do further tests should you guys need something specific.

Nice! Cant wait to see my results. I've been lagging on developing my roll. I still have 10 frames left, and don't wanna just burn them.

That's the beauty of film, don't rush it!

Question, the shot at infinity that's on top of the comparison grid. Is that wide open? If so, did it perform that badly on the contax g bodies that badly at infinity wide open?

Thanks for pointing that out. I added this explanation to the review: "Before every comparison chart you will see a half size G35/2 image at f2, for no reason really other than to show you what the whole scene looked like."

So yes, that was the G35/2 at f2. Indeed, there's a bunch of vignetting and smearing at f2 and a bit at f2.8, which to me is really normal behaviour. What's quite awesome here is that at f4 the G35/2 at infinity is already very usable in the corners, IMO. I never shot this on the G2 since this one and the Hologon 16 are the only ones I do not have in G mount.

wow; thanks for the intensive review.

i now have 3 35mm lens, in which 2 are Leica authentic and one is LLL replica.

don't know if i should add another Contax G lens. Never use Carl Zeiss before.

your test shows stellar performance of the Contax 35/2
well done.

Hah, what a nice problem to have 🙂 I was a little late on that LLL train and I couldn't get one before they shot up in price, but now I am going to stick to my G35/2.

The 7Artisan, well, WYSIWYG for US$429.

Thanks for the nice words Liam. In all honesty, I really love the 7artisans, like I mentioned in the review, it shows some lovely 3d pop and smooth bokeh. It renders very warmly though and sometimes towards warm greens. The form and build are quite amazing, the focus is so smooth. Don't forget the 7artisans is an internal focus lens as opposed to the classic block focus of the others. Same as the Lux (?) (head scratch)
 
Last edited:
Nice job!

I had the 35/2 on my G1 a long while back, it was obviously an excellent performer but unfairly slighted on the net.

Too bad this helical is so expensive; costwise, it's best to just stick with the ZM Biogon.
 
Thank you for the nice words everyone!


Nice job!

I had the 35/2 on my G1 a long while back, it was obviously an excellent performer but unfairly slighted on the net.

Too bad this helical is so expensive; costwise, it's best to just stick with the ZM Biogon.

There is one truth aspect in what you say in the sense that if cost is your sole metric, then probably newer lenses will give you more bang (I haven't used the ZM Biogons but I hear good things about them). Having that said, I think this is a lens for the collectors that appreciate little gems and use them at the same time. For them, myself included, shooting unique setups like these are a major part of the fun, feeling your camera calling you to make photographs is a priceless feeling to me. That's why I moved to Leica to begin with, from Canon to Pentax 645 to Sony A7R3 to Leica M. It is all subjective, my friend 🙂 We're all here with one common thread: we all love photography so I just want you to enjoy your gear and your photographic experiences.
 
The enjoyment of exploring a lens is priceless. By pure chance, the G1 came to me with 3 lenses, and it did not include the 35/2. I had a Summicron 35/2 V1, so I did not get the 35/2 G lens then. I would be surprised if the Zeiss 35/2G were not a great lens.
 
Like said before the G35/2 has almost identical diagram to the 7-element 35 Summicron v4. Similar design, similar performance. There is no magic here.

I found Kyocera/Carl Zeiss’s approach back then to be a bit conservative though. The Xenotar-derived 35/2 lens of the Konica Hexar was intentionally designed to be under corrected for spherical aberration - and when in its standalone forms, the LTM L-Hexanon and UC-Hexanon 35/2, display severe focus shift at mid aperture range - but still got glowing reviews. The reason is since it’s a lens designed for a fixed lens camera, the Hexar body has built-in AF compensation for each of the F stops to eliminate the effect of focus shift. It’s like a precursor to today’s auto “baked in” lens correction in mirrorless systems.

Being a closed AF system, the Contax G was fully justified to go along this route and push for ultimate performance. But they didn’t...
 
Back
Top Bottom