40 mm ART on SDQH

Yes, I know. That is why, for example, I am very satisfied with the very good 14-24mm zoom that I bought in the spring. It combines multiple lenses at the wide end (14-19-24mm), saving me weight and space in my bag.. a 40mm lens would actually do a similar service instead of 35mm and 50mm lenses - it would save me weight and space in my bag. Both solutions seem good/economical to me. :-)

Peter
 
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Yes, I know. That is why, for example, I am very satisfied with the very good 14-24mm zoom that I bought in the spring. It combines multiple lenses at the wide end (14-19-24mm), saving me weight and space in my bag.. a 40mm lens would actually do a similar service instead of 35mm and 50mm lenses - it would save me weight and space in my bag. Both solutions seem good/economical to me. :-)

Peter
FWIW, below is a link to a thread discussing the performance of the new lenses, as well as the 40mm, which one user liked while another found had too much coma and astigmatism for his use.

Discussion on Cloudy Nights.
 
Thanks, I'm not into astrophotography, I like daytime photos.
I provided the link for any who might be interested in the question, though it’s nice to know the parameters of your photographic interests.

Given that astrophotography is the field which is perhaps the most demanding of optical performance (for images taken near infinity), the information gleaned from astrophotographers should be interesting to anyone after high quality lenses, even for those whose requirements might be much less stringent. As an example, some people who like daytime photos, landscapes, say, might prefer a lens with low field curvature, which is generally desirable in astrophotography.
 
I understand. There are plenty of other sites:

https://www.nadir.it/ob-fot/SIGMA_40-ART/sigma-40mm-art.htm

"Noticing differences in the field between the Sigma 40mm F / 1.4 Art and the Zeiss 35 / 1.4 is very difficult. On paper and at the highest magnifications the Sigma wins, but there are no appreciable differences in the real world where, instead, you can see a better correction of the Sigma for chromatic aberration (surprisingly it is easy to find traces of purple fringing in the photos taken with the Zeiss) and a greater sense of cleanliness especially with high resolution sensors such as that of the Sony A7R III. The Sigma 40mm F / 1.4 Art wins over the Zeiss also for the absence of field curvature. Examining the images at 100% the differences in favor of the Sigma leap to the eye, especially at the edges. No coma for the Sigma, visible instead in the photos taken with the Zeiss."..

or: https://www.cameralabs.com/sigma-40mm-f1-4-art-review/2/

or: https://www.lensrentals.com/blog/2019/03/mtf-results-for-recent-sigma-art-lenses/

The best is the personal experience of someone from this forum who owns and knows a 40mm Art lens. Does anyone own this lens please?
 
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I found a post where "furtle" added a picture from his SDQ H camera with a 40mmArt lens.

May 25, 2019
May 25, 2019

Can I ask you for information on how you work with the 40mm Art lens on the SDQ H body?

Thank you in advance for your reply. Peter
 
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Hi Mike. I looked for a mention of focus shift in reviews of the 40mm Art lens -the website states (Verdict):
"My testing revealed the optical performance of the Sigma 40mm f1.4 Art is near flawless making it one of the best in the Art line: It is very sharp across the full-frame sensor in close quarters and at longer distances, has almost no color aberrations and produces a nice soft Bokeh rendering the background pleasantly blurred. Plus its resistance against flare and glare in strong contra light is very good. Its only optical weakness is the focus shift when stopped down from f1.4 to f2.0. But this is only a problem when using the lens on a DSLR body in phase-detect AF. All modern mirrorless bodies auto-focus stopped down.."

https://www.cameralabs.com/sigma-40mm-f1-4-art-review/4/

Was this what you meant? Well thank you. Peter
 
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The only flaw I've read about is it does have significant focus shift from f1.4 to f5.6.
I use it on a D810 and I don't have that problem. Anyhow, if you use it as intended at F1.4 where it is one of the best "standard" lenses wide open on the market, that becomes a moot point.
 
I have this lens. One of the best art lens and one of the last arts released for dslr mounts in 2018 I think. The last arts were the best with better AF than the older arts. I have the 28 40 105 and 135 some in SA and some in EF mount. I passed on the 35 50 and 85 as older arts. I use the 40 on my 5dsr and A9. Very good on both. The 28 105 and 135 I have used on quattro H SD1m A9. They all work well on Sony bodies.

DA
 
Hi Mike. I looked for a mention of focus shift in reviews of the 40mm Art lens -the website states (Verdict):
"My testing revealed the optical performance of the Sigma 40mm f1.4 Art is near flawless making it one of the best in the Art line: It is very sharp across the full-frame sensor in close quarters and at longer distances, has almost no color aberrations and produces a nice soft Bokeh rendering the background pleasantly blurred. Plus its resistance against flare and glare in strong contra light is very good. Its only optical weakness is the focus shift when stopped down from f1.4 to f2.0. But this is only a problem when using the lens on a DSLR body in phase-detect AF. All modern mirrorless bodies auto-focus stopped down.."

https://www.cameralabs.com/sigma-40mm-f1-4-art-review/4/

Was this what you meant? Well thank you. Peter
Yes. If you're using it on a dslr body then you have to be aware of this problem, but mirrorless bodies self correct it.
 
Mike, I think that any special Sigma lens and equipment repair shop (eg AHW Service Prague) will remove this focus problem on DSLRs from F1.4 to F2 (or to F4).
AHW Service Praque precisely adjusted all my lenses exactly to the body of my SD1 Merrill camera. In the end, it won't be necessary on the new FFF.

Peter
 
Mike, I think that any special Sigma lens and equipment repair shop (eg AHW Service Prague) will remove this focus problem on DSLRs from F1.4 to F2 (or to F4).
AHW Service Praque precisely adjusted all my lenses exactly to the body of my SD1 Merrill camera. In the end, it won't be necessary on the new FFF.

Peter
True, the lens is designed for dslrs which focus wide open, but a mirrorless that focuses stopped down won't see this problem.

Since I have a SD1M I have to be cognizant of this problem.
 
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I understand, Mike.
I ordered this lens (in place of the 35mm and 50mm lens), it will arrive from Japan next week. I will send the lens to AHW Prague to be set on the SD1 M body and I will draw attention to this matter. We'll see what the result will be.

Thank you. Peter

PS: I noticed we have the same Canon iPF6400 printer. How is this printer working for you?
 
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I understand, Mike.
I ordered this lens (in place of the 35mm and 50mm lens), it will arrive from Japan next week. I will send the lens to AHW Prague to be set on the SD1 M body and I will draw attention to this matter. We'll see what the result will be.
Unless you plan on shooting it wide open a lot you could have them set it at your favorite aperture.
Thank you. Peter

PS: I noticed we have the same Canon iPF6400 printer. How is this printer working for you?
It's certainly been better than the Epsons I used to own in that I don't need to run nozzle checks and often cleanings every day, but it does require the occasional head replacement, but I can safely go for weeks without printing anything and still have clean nozzle checks. It doesn't like really stiff or thick paper though whereas the Epsons (9600, 9800, 7800, 4800) I've owned had no problems with them (except the 4800 which has a cured printing path).

The colors are really good too and I don't notice any bronzing but then I don't print on glossy paper. Mostly I print on canvas.
 

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