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300mm f/2.8 - Yashma-4 anyone?
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PostPosted: Mon Apr 25, 2022 11:41 am    Post subject: Reply with quote
Another factor at least for me is, that it is not possible to post the full blast of an digital image data at any forum, nor you can watch it on your personal monitor screen! So, therefore this whole subject doesn't matter!

A good nice image shot, does not require any pixel peeping at all! Even an good human's eye, cannot seperate more than 12L/mm!

Cheers, Friends


PostPosted: Mon Apr 25, 2022 12:31 pm    Post subject: Reply with quote
RokkorDoctor wrote:
Alsatian2017 wrote:
RokkorDoctor wrote:

But whilst I personally share your disinterest in pixel-peeping myself, do bear in mind that judging by the prevalence of pixel-peepers across all photography forums, a fair number of amateur photographers simply enjoy the hunting down of sharp lenses, especially if they can identify a "hidden gem". I'm not going to dismiss their enjoyment of that quest as irrelevant. Everyone can find something different interesting in photography, which makes it such a universally enjoyed hobby Wink


Nethertheless, I feel that a 300 mm f/2,8 lens like the Yashma is not bought only for the nice rendering and big and pretty lens shade , unlike a Triotar Wink

Such a lens has a clear purpose (animals, sports, fashion, landscape, etc.) and most photographers wouldn't just drag it around to get some fuzzy flower pictures...

So a little pixelpeeping would be certainly warranted, given that most of Yashmas's rivals are quite sophisticated lenses.


Oh, I get where you are coming from, and if OPAL is happy to provide those crops that's no issue at all. Wink

I am more than happy that OPAL just showed what this interesting behemoth looks like. Sharpness details of this lens matter little to me personally.
Just knowing that it exists satisfies my curiosity here. Thank You Dog

IMHO there should be no perceived obligation (either explicit or implicit) on any members to post performance/IQ samples of their lenses, even if they are rare ones. Repeated requests for samples even after the poster has indicated they don't do "lens testing shots" because that is not their cup of tea, makes it feel like an implicit obligation... The result after a few of those experiences: they stop posting about their lenses... Sad

Unfortunately the vocal nature of a minority of pixel-peepers in the photographic community as a whole is implicitly forcing everyone into making pixel-peeping part of their hobby. It shouldn't.

I know that that is precisely why I have held off for so long becoming a member of any photography/gear forums.


Sure, one shouldn't press members to post crops or high resolution images Wink

But Opal just keeps wetting our appetite through writing about this lens, here and in other photo forums, and since he's about the only one doing so and owning this lens, it would be nice to see a little bit more. Don't forget that some members here actually love to take pictures (that's my case) besides collecting lenses (in that case nice "camera porn" pictures with huge lens hoods would be perfectly adequate) Twisted Evil


PostPosted: Mon Apr 25, 2022 12:35 pm    Post subject: Reply with quote
OPAL wrote:
Another factor at least for me is, that it is not possible to post the full blast of an digital image data at any forum, nor you can watch it on your personal monitor screen! So, therefore this whole subject doesn't matter!

A good nice image shot, does not require any pixel peeping at all! Even an good human's eye, cannot seperate more than 12L/mm!

Cheers, Friends


Try postimage.org, the limit is 24Mb and 10k x 10k pixels. No account needed, can paste in from clipboard.


PostPosted: Mon Apr 25, 2022 1:51 pm    Post subject: Reply with quote


Just an "hand held test shot", with my YASHMA MC 2,8/300mm lens at f/5,6 + C/Y Zeiss MUTAR II converter = f/11, adapted to my 24MP SONY A6500mm = 900mm! Distance approx. 150m.


PostPosted: Mon Apr 25, 2022 3:06 pm    Post subject: Reply with quote
Like 1 small

Sure, there is some colour fringing, but that looks like a very usable lens to my eyes.


PostPosted: Mon Apr 25, 2022 3:44 pm    Post subject: Reply with quote
Alsatian2017 wrote:
Don't forget that some members here actually love to take pictures (that's my case) besides collecting lenses (in that case nice "camera porn" pictures with huge lens hoods would be perfectly adequate) Twisted Evil


Pretty much all of us here love to take pictures I would assume.

I think OPAL was having a swipe not at members who like taking pictures, but members who seem intent on having as many others as possible join in their pixel-peeping obsession. For some of us taking pictures is fun, pixel-peeping is boring. Personally, I do a bit of both Wink


PostPosted: Mon Apr 25, 2022 4:11 pm    Post subject: Reply with quote
OPAL wrote:


Just an "hand held test shot", with my YASHMA MC 2,8/300mm lens at f/5,6 + C/Y Zeiss MUTAR II converter = f/11, adapted to my 24MP SONY A6500mm = 900mm! Distance approx. 150m.


Looks pretty good Like 1 Like 1

How does the converter affect IQ ?


PostPosted: Mon Apr 25, 2022 4:36 pm    Post subject: Reply with quote
Alsatian2017 wrote:
OPAL wrote:


Just an "hand held test shot", with my YASHMA MC 2,8/300mm lens at f/5,6 + C/Y Zeiss MUTAR II converter = f/11, adapted to my 24MP SONY A6500mm = 900mm! Distance approx. 150m.


Looks pretty good Like 1 Like 1

How does the converter affect IQ ?


This excellent Zeiss MUTAR II converter with 7/4 elements, were originally designed for the excellent Zeiss Apo Teletessar T* 2,8/300mm, and works also very well on my C/Y Zeiss SONNAR T* 2,8/180mm, and surprisingly very good also on my 1974 SIGMATEL YS MC 1,8/135mm, with an Contax mount! These combinations provide me on my APS Sony A6500 with an focal length of 540mm (!) and an fairly compact optical acceptable good 405mm (!) telephoto lens. The Sony A6500 allows me with its lens stabilization, just for me, an very good hand held option!


PostPosted: Tue Apr 26, 2022 7:22 am    Post subject: Reply with quote
Regardless of image stabilisation, that is pretty impressive for a hand held shot on such a long focal length.


PostPosted: Tue Apr 26, 2022 7:43 am    Post subject: Reply with quote
RokkorDoctor wrote:
Regardless of image stabilisation, that is pretty impressive for a hand held shot on such a long focal length.


YES indeed, as an fairly old photo shooter, I have still quiet good shooting hands, exerienced from my old medium format days!


PostPosted: Tue Apr 26, 2022 7:57 am    Post subject: Reply with quote
OPAL wrote:
RokkorDoctor wrote:
Regardless of image stabilisation, that is pretty impressive for a hand held shot on such a long focal length.


YES indeed, as an fairly old photo shooter, I have still quiet good shooting hands, exerienced from my old medium format days!


Lucky you!

That rule of 1/f for minimum shutter speed stopped working for me many years ago... Sad

I always have slightly shaky hands. Probably didn't help that my mother was prescribed Valium during here pregnancy Rolling Eyes


PostPosted: Wed Apr 27, 2022 2:56 pm    Post subject: Reply with quote
Today, I've made quickly a couple hand held shots with the YASHMA 300mm lens adapted on my Sony A7! f/5,6 - 1/250s - ISO 200.






PostPosted: Wed Apr 27, 2022 3:39 pm    Post subject: Reply with quote
Like 1 small

It does seem to have an above-average amount of pincushion distortion, but that should be easily fixable in PP.


PostPosted: Wed Apr 27, 2022 4:08 pm    Post subject: Reply with quote
RokkorDoctor wrote:
OPAL wrote:
RokkorDoctor wrote:
Regardless of image stabilisation, that is pretty impressive for a hand held shot on such a long focal length.


YES indeed, as an fairly old photo shooter, I have still quiet good shooting hands, exerienced from my old medium format days!


Lucky you!

That rule of 1/f for minimum shutter speed stopped working for me many years ago... Sad

I always have slightly shaky hands. Probably didn't help that my mother was prescribed Valium during here pregnancy Rolling Eyes


This has been a bit of a sore point with me over the last few years, and I think age has everything to do with it.
I have good days still, getting away with 1/20 sec @ 200mm, but they are getting further apart.
Some days, 1/500 @ 50mm is no where near enough Rolling Eyes
Fortunately, the fun factor is still there, and I'm having a great time trying.
The elbows against chest that I learned with the SQ-A and it's speed-grip and WLF still works sometimes...

-D.S.


PostPosted: Wed Apr 27, 2022 5:14 pm    Post subject: Reply with quote
RokkorDoctor wrote:
Like 1 small

It does seem to have an above-average amount of pincushion distortion, but that should be easily fixable in PP.



Yes, I must look into it, but shooting from an lower street side angle, might has causing it! Wink


PostPosted: Fri Apr 29, 2022 12:45 pm    Post subject: Reply with quote
OPAL wrote:
RokkorDoctor wrote:
Like 1 small

It does seem to have an above-average amount of pincushion distortion, but that should be easily fixable in PP.



Yes, I must look into it, but shooting from an lower street side angle, might has causing it! Wink


The lower angle might have well caused converting lines but certainly not pincushion distorsion. Indeed, distorsion seems very heavy but I guess for the most common tele lens subjects it just wouldn't be bothersome.
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