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Archive 2016Contax 35-70 vs 24-70 GM? Ultimate landscape lens?

  
 
GMPhotography
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p.6 #1Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
Lot more contrast on the Contax. Does it make it look sharper because of it?
Apr 20, 2016 at 09:43 PM
DavidBM
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p.6 #2Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
Fred Miranda wrote:
I just saw the extreme edges at 50mm and the Contax performed much better than at 35mm. You will be surprised.


OK that's enough. I just pulled the trigger!
I got one for about $US 320 which seems like a good deal, from someone I've dealt with before, who assures me that the focus/zoom is neither to stiff nor sloppy and the optics are in perfect nick.

I'll take it on my big Central Australian hiking trip along with the L21 and then I can always sell it when I get back if I don't see a use for it....

now adapters....I like the Rayqual ones; seem to be as good as Novlofllex in terms of precision, but with really nice baffles which can really help.

Or I can get cheapo (I've had good luck with K&D concept) and install my own baffles from telescope flocking...
Apr 20, 2016 at 09:44 PM
Schlotkins
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p.6 #3Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
Are you going straight from Contax mount to e mount Fred? Thanks.
Apr 20, 2016 at 09:48 PM
Fred Miranda
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p.6 #4Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
GMPhotography wrote:
Lot more contrast on the Contax. Does it make it look sharper because of it?


I used the same settings for both (sharpening and exposure adjustments). The Contax seems to be render colors differently and definitely have more punch (contrast). It does not touch the GM at wider apertures but for landscape at f/8-f/11, I think it performs very well. It seems to diffract a bit less at f/11 when compared to the GM zoom.
Apr 20, 2016 at 09:52 PM
Fred Miranda
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p.6 #5Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
Schlotkins wrote:
Are you going straight from Contax mount to e mount Fred? Thanks.


Yes, C/Y to E-Mount.

I have a Kipon adapter coming tomorrow. I have heard great thinks about Kipon's tolerance. It's a premium adapter ($78 at Ebay). I will test it and see if the lens+adapter maintains the same alignment I'm getting with the Novoflex.
Only if it does, I'll let you guys know.
Apr 20, 2016 at 09:57 PM
Schlotkins
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p.6 #6Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
Thanks Fred. I just sold one of these. I compared it to the canon zoom and didn't notice as large a different but my was adapted to EOS. It was also on an a7r.

Regardless I usually shoot landscapes under 35mm so it's kind of a moot point.
Apr 20, 2016 at 10:01 PM
ytwong
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p.6 #7Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
extreme corner @ 35mm on the C/Y is a little worse than I'm hopping for (I 'm thinking to get one while in Japan...I'm heading there soon), since I started doing a bit timelapse(timelapse don't need super hi-res but I would use the raw, still images as well) , able to shoot at, say, 5.6 would give me better shutter speed (thus less time between shots).

The other crops looks really good.

The C/Y is not expensive and very small compare to the GM, seems to be a good walk around lens.
Apr 20, 2016 at 10:09 PM
Greggf
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p.6 #8Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
Finally!!
Just got the kids to bed,and saw this on the forum. wow, is all I have to say, and pretty damn impressive for a "How old zoom?"...
Fred, I mentioned that I thought my copy was equal to my Loxia 50 at comparable apertures, except for f4! And I think my copy, is also excellent @35mm, pretty much to the edges. Took it to work today, but I had too many stops to deliver(205...I'm a UPS Driver by trade here in Santa Cruz) and didn't have to dally, unfortunately. But it seems Bob has stepped up for me, and has posted more pics today!!

OK that's enough. I just pulled the trigger! I got one for about $US 320 which seems like a good deal, from someone I've dealt with before, who assures me that the focus/zoom is neither to stiff nor sloppy and the optics are in perfect nick. I'll take it on my big Central Australian hiking trip along with the L21 and then I can always sell it when I get back if I don't see a use for it.... now adapters....I like the Rayqual ones; seem to be as good as Novlofllex in terms of precision, but with really nice baffles...Show more →
Dave... I have the Rayqual, and I don't have any problems whatsoever. And it has perfect infinity as well, both with my 35-70, and Bokina 90 2.5 in Contax mount.
I paid just a tad more than you for my copy this last time. Earlier versions I've had, I paid close to $450 plus...You will love it.
And apparently, between myself, Bob, Fred(Thanks for the tests, BTW!), and you, the prices might start to edge higher again....
Gregg
Apr 20, 2016 at 10:10 PM
DavidBM
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p.6 #9Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
Fred Miranda wrote:
Schlotkins wroteAre you going straight from Contax mount to e mount Fred? Thanks.
Yes, C/Y to E-Mount.

I have a Kipon adapter coming tomorrow. I have heard great thinks about Kipon's tolerance. It's a premium adapter ($78 at Ebay). I will test it and see if the lens+adapter maintains the same alignment I'm getting with the Novoflex.
Only if it does, I'll let you guys know.


I've just ordered the Rayqual (Kindai)
I'ts even pricier, but I hear really good things about the tolerances. I'll report back.
In the past I've used Novoflex for pricier lenses (Like the Apo Panther 180) and installed my own flocking.

But the Rayqual has a really ingenious and thorough system of light baffles inside it, which can really help, so if the tolerances are indeed good it might even be worth the slightly stupid money...(around 150 US)
Apr 20, 2016 at 10:11 PM
GMPhotography
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p.6 #10Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
Yes that makes sense, nice lens but I'll stay with my GM since it is better at the wider apertures

Fred Miranda wrote:
GMPhotography wroteLot more contrast on the Contax. Does it make it look sharper because of it?
I used the same settings for both (sharpening and exposure adjustments). The Contax seems to be render colors differently and definitely have more punch (contrast). It does not touch the GM at wider apertures but for landscape at f/8-f/11, I think it performs very well. It seems to diffract a bit less at f/11 when compared to the GM zoom.

Apr 20, 2016 at 10:12 PM
Fred Miranda
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p.6 #11Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
ytwong wrote:
extreme corner @ 35mm on the C/Y is a little worse than I'm hopping for (I 'm thinking to get one while in Japan...I'm heading there soon), since I started doing a bit timelapse(timelapse don't need super hi-res but I would use the raw, still images as well) , able to shoot at, say, 5.6 would give me better shutter speed (thus less time between shots).

The other crops looks really good.

The C/Y is not expensive and very small compare to the GM, seems to be a good walk around lens.


I would stay away from 35mm and f/5.6. However, at 50mm and 70mm (I just saw the 70mm), it's not a problem.
Apr 20, 2016 at 10:15 PM
DavidBM
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p.6 #12Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
GMPhotography wrote:
Yes that makes sense, nice lens but I'll stay with my GM since it is better at the wider apertures



Of course Guy; the GM is an amazing all round lens in a way that this classic isn't.

I'm not getting it for all round use: I'm getting it to take backpacking in the Australian desert for a week where the lighter weight is important, and I'm taking a lightish tripod, and pairing it with the Lox 21 for desert landscapes.

If I wanted an all round zoom for regular travel landscape and portraiture, I'd take the GM for sure.

Edited on Apr 20, 2016 at 10:22 PM · View previous versions
Apr 20, 2016 at 10:17 PM
DavidBM
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p.6 #13Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
Fred Miranda wrote:
ytwong wroteextreme corner @ 35mm on the C/Y is a little worse than I'm hopping for (I 'm thinking to get one while in Japan...I'm heading there soon), since I started doing a bit timelapse(timelapse don't need super hi-res but I would use the raw, still images as well) , able to shoot at, say, 5.6 would give me better shutter speed (thus less time between shots).

The other crops looks really good.

The C/Y is not expensive and very small compare to the GM, seems to be a good walk around lens.
I would stay away from 35mm and f/5.6. However, at 50mm and 70mm (I just saw the 70mm), it's not a problem.


Whats interesting and encouraging is that Fred's tests are shaping up to match the published MTF very closely!
Apr 20, 2016 at 10:19 PM
GMPhotography
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p.6 #14Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
Yes sounds like a nice back country lens to sport around no question

DavidBM wrote:
GMPhotography wroteYes that makes sense, nice lens but I'll stay with my GM since it is better at the wider apertures
Of course Guy; the GM is an amazing all round lens in a way that this classic isn't.

I'm not getting it for all round use: I'm getting it to take backpacking in the Australian desert for a week where the lighter weight is important, and I'm taking a lightish tripod, and pairing it with the Lox 21 for desert landscapes.

If I wanted an all round zoom for regular travel and portraiture, I'd take the GM for sure.

Apr 20, 2016 at 10:23 PM
Fred Miranda
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p.6 #15Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
DavidBM wrote:
Fred Miranda wrote
ytwong wroteextreme corner @ 35mm on the C/Y is a little worse than I'm hopping for (I 'm thinking to get one while in Japan...I'm heading there soon), since I started doing a bit timelapse(timelapse don't need super hi-res but I would use the raw, still images as well) , able to shoot at, say, 5.6 would give me better shutter speed (thus less time between shots).

The other crops looks really good.

The C/Y is not expensive and very small compare to the GM, seems to be a good walk around lens.
I would stay away from 35mm and f/5.6. However, at 50mm and 70mm (I just saw the 70mm), it's not a problem.
Whats interesting and encouraging is that Fred's tests are shaping up to match the published MTF very closely!


I think it's because their MTF tests are done with a real lens at infinity focus.
Apr 20, 2016 at 10:24 PM
Fred Miranda
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p.6 #16Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
DavidBM wrote:
GMPhotography wroteYes that makes sense, nice lens but I'll stay with my GM since it is better at the wider apertures
Of course Guy; the GM is an amazing all round lens in a way that this classic isn't.

I'm not getting it for all round use: I'm getting it to take backpacking in the Australian desert for a week where the lighter weight is important, and I'm taking a lightish tripod, and pairing it with the Lox 21 for desert landscapes.

If I wanted an all round zoom for regular travel landscape and portraiture, I'd take the GM for sure.


I agree. The Contax does not touch the GM in versatility and range. However, when shooting landscapes at smaller apertures it's a great alternative. It's color, warm tones and micro-contrast are similar to the Loxias.

-------------------------

GMPhotography wrote:
Yes sounds like a nice back country lens to sport around no question

DavidBM wrote
GMPhotography wroteYes that makes sense, nice lens but I'll stay with my GM since it is better at the wider apertures
Of course Guy; the GM is an amazing all round lens in a way that this classic isn't.

I'm not getting it for all round use: I'm getting it to take backpacking in the Australian desert for a week where the lighter weight is important, and I'm taking a lightish tripod, and pairing it with the Lox 21 for desert landscapes.

If I wanted an all round zoom for regular travel and portraiture, I'd take the GM for sure.

Guy,
Look how small it is next to the loxia 21:
https://www.fredmiranda.com/forum/topic/1423138/2#13516633
Apr 20, 2016 at 10:27 PM
GMPhotography
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p.6 #17Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
So many great options we have. Sony does have a press conference tommorrow maybe something interesting. I'm in for more GMs
Apr 20, 2016 at 10:31 PM
DavidBM
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p.6 #18Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
GMPhotography wrote:
So many great options we have. Sony does have a press conference tommorrow maybe something interesting. I'm in for more GMs


135mm f2 ore thereabouts and it'll be the first GM I buy!
Apr 20, 2016 at 10:33 PM
Fred Miranda
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p.6 #19Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
Ok, I will have the center crops for the 50mm in a few minutes.
Apr 20, 2016 at 10:35 PM
Fred Miranda
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p.6 #20Contax 35-70 vs 24-70 GM? Ultimate landscape lens?
Here are the center crops at 50mm.


https://www.fredmiranda.com/Buzz/50-THUMB.jpg


CENTER at 50mm


FE 24-70/2.8GM | C/Y 35-70/3.4

https://www.fredmiranda.com/Buzz/gmvscy-CENTER-50.jpg

FE 24-70/2.8GM | C/Y 35-70/3.4
Apr 20, 2016 at 10:42 PM
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