Sigma 35mm F2 DG DN defaults to F4.0 when setting to Auto instead of F2.0.

Started 4 months ago | Discussions
flipp
flipp New Member • Posts: 4
Sigma 35mm F2 DG DN defaults to F4.0 when setting to Auto instead of F2.0.

My Sigma 35mm F2 DG DN always sets itself to F4.0 when i turn the Aperture Ring to "A" instead of F2.0. Can anybody replicate ths behaviour? Is it only my Lens? Why does it do that instead of setting itself to the widest Aperture? I thought it was cause i had used the 70-200 F4 before and the Camera remembers the "lowest" possible Aperture, but i put on a F1.4 Lens and then the Sigma 35 F2.0 and it still goes to 4.0 when i scroll trough the Aperture Ring and end at "A". Kindy bugs me that i then always have to ajust the Aperture.

Gear used: Sony A7III, Sigma 35mm F2 DG DN, Sigma MC-11 with Canon L 70-200/F4.0 and Sigma Art 35mm F1.4.

tldr: Put Sigma 35/F2 DG DN on Sony A7iii and used the Aperture Ring from 2.0 over 22 to A and the Aperture defaults to 4.0 in the Camera instead of 2.0.

Edit: I made a video and uploaded it here (https://www.dropbox.com/s/8jp33rpe2f1pm8p/Video%2017.01.21%2C%2020%2043%2039.mov?dl=0) maybe then it’s clearer. At the end you see me changing it to 2.0, then use the lens ring and after 22 comes 4.0 when I reach β€žAβ€œ. It would make sense to keep 22 or change to 2.0. but 4.0... I don’t know... πŸ€·πŸ»β€β™‚οΈ

Martin_99 Senior Member • Posts: 1,642
Re: Sigma 35mm F2 DG DN defaults to F4.0 when setting to Auto instead of F2.0.
1

flipp wrote:

My Sigma 35mm F2 DG DN always sets itself to F4.0 when i turn the Aperture Ring to "A" instead of F2.0. Can anybody replicate ths behaviour? Is it only my Lens? Why does it do that instead of setting itself to the widest Aperture? I thought it was cause i had used the 70-200 F4 before and the Camera remembers the "lowest" possible Aperture, but i put on a F1.4 Lens and then the Sigma 35 F2.0 and it still goes to 4.0 when i scroll trough the Aperture Ring and end at "A". Kindy bugs me that i then always have to ajust the Aperture.

I'm sorry, I don't help you, but offer different perspective. When switching to A, camera don't know what aperture you want to use. As f2 - f8 is probably the most used range, the f4 is good middleground to quickly change both ways.

Question for me is, why you change to A anyway. I would stay on A and use in camera control or use ring and therefore avoid A. It's better to stay at one way for me to train muscle memory

Gear used: Sony A7III, Sigma 35mm F2 DG DN, Sigma MC-11 with Canon L 70-200/F4.0 and Sigma Art 35mm F1.4.

tldr: Put Sigma 35/F2 DG DN on Sony A7iii and used the Aperture Ring from 2.0 over 22 to A and the Aperture defaults to 4.0 in the Camera instead of 2.0.

Edit: I made a video and uploaded it here (https://www.dropbox.com/s/8jp33rpe2f1pm8p/Video%2017.01.21%2C%2020%2043%2039.mov?dl=0) maybe then it’s clearer. At the end you see me changing it to 2.0, then use the lens ring and after 22 comes 4.0 when I reach „A“. It would make sense to keep 22 or change to 2.0. but 4.0... I don’t know... 🀷🏻‍♂️

No, it wouldn't make sense, at least f22 would be terrible decision. F2 is better, but eg. for photogs who often shoot in f8-f11 range not so.

 Martin_99's gear list:Martin_99's gear list
Sony a6400 Sony Carl Zeiss Sonnar T* E 24mm F1.8 ZA Sony E 50mm F1.8 OSS Sony E 18-135mm F3.5-5.6 OSS Sony E 70-350mm F4.5-6.3 G OSS
flipp
OP flipp New Member • Posts: 4
Re: Sigma 35mm F2 DG DN defaults to F4.0 when setting to Auto instead of F2.0.

Martin_99 wrote:

flipp wrote:

My Sigma 35mm F2 DG DN always sets itself to F4.0 when i turn the Aperture Ring to "A" instead of F2.0. Can anybody replicate ths behaviour? Is it only my Lens? Why does it do that instead of setting itself to the widest Aperture? I thought it was cause i had used the 70-200 F4 before and the Camera remembers the "lowest" possible Aperture, but i put on a F1.4 Lens and then the Sigma 35 F2.0 and it still goes to 4.0 when i scroll trough the Aperture Ring and end at "A". Kindy bugs me that i then always have to ajust the Aperture.

I'm sorry, I don't help you, but offer different perspective. When switching to A, camera don't know what aperture you want to use. As f2 - f8 is probably the most used range, the f4 is good middleground to quickly change both ways.

Question for me is, why you change to A anyway. I would stay on A and use in camera control or use ring and therefore avoid A. It's better to stay at one way for me to train muscle memory

Hmm yes, you are right, it is a good middleground. I was just wondering cause for example minolta Lenses switch to the highest available Aperture. So i kinda expectet it to be the same or to be switching to the lowest.

I dont know how i will use the ring in the future. I just got the lens and on my first day of shooting i was testing around and it bugged me that i changed to 4.0 when i used A after using the ring. Like you said maybe its better when i keep using one way. I bought the lens cause in the future i wanted to buy a a7c for light travel and then i have to use the aperture ring cause it dosent have a front dial. My normal camera is a a7iii and there i use the front dial for aperture changes. Maybe this is the reason why i wanted to use both features.

Thanks for your reply.

kelly15 Contributing Member • Posts: 864
Re: Sigma 35mm F2 DG DN defaults to F4.0 when setting to Auto instead of F2.0.
1

F/4.0 is the aperture the lens is at it’s best.

 kelly15's gear list:kelly15's gear list
Sony a6400 Sony a7R IV Sony E 16-50mm F3.5-5.6 PZ OSS Sony FE 50mm F1.4 ZA Sony FE 24-105mm F4 +7 more
Nokiron
Nokiron Regular Member • Posts: 305
Re: Sigma 35mm F2 DG DN defaults to F4.0 when setting to Auto instead of F2.0.
1

My Sigma 105 DG DN Macro does the same. It goes to F4.

 Nokiron's gear list:Nokiron's gear list
Ricoh GR III Sony a7 Sony a7R IV Sony FE 55mm F1.8 Tamron 28-75mm F2.8 III +9 more
kelly15 Contributing Member • Posts: 864
Re: Sigma 35mm F2 DG DN defaults to F4.0 when setting to Auto instead of F2.0.
1

My 85 DN too.

F/4.0 usually is the best aperture of modern design lenses.

 kelly15's gear list:kelly15's gear list
Sony a6400 Sony a7R IV Sony E 16-50mm F3.5-5.6 PZ OSS Sony FE 50mm F1.4 ZA Sony FE 24-105mm F4 +7 more
Martin_99 Senior Member • Posts: 1,642
Re: Sigma 35mm F2 DG DN defaults to F4.0 when setting to Auto instead of F2.0.
1

kelly15 wrote:

My 85 DN too.

F/4.0 usually is the best aperture of modern design lenses.

f5.6 zooms can disagree 😁😁

But yeah, most primes are best at f4-f5.6. Modern lenses from few years ago are mostly very good also wide open, means like around 80% of sharpness in comparison to best aperture. So stopping down is not so necessary as in the past.

 Martin_99's gear list:Martin_99's gear list
Sony a6400 Sony Carl Zeiss Sonnar T* E 24mm F1.8 ZA Sony E 50mm F1.8 OSS Sony E 18-135mm F3.5-5.6 OSS Sony E 70-350mm F4.5-6.3 G OSS
flipp
OP flipp New Member • Posts: 4
Re: Sigma 35mm F2 DG DN defaults to F4.0 when setting to Auto instead of F2.0.

kelly15 wrote:

F/4.0 is the aperture the lens is at it’s best.

Nokiron wrote:

My Sigma 105 DG DN Macro does the same. It goes to F4.

Martin_99 wrote:

kelly15 wrote:

My 85 DN too.

F/4.0 usually is the best aperture of modern design lenses.

f5.6 zooms can disagree 😁😁

But yeah, most primes are best at f4-f5.6. Modern lenses from few years ago are mostly very good also wide open, means like around 80% of sharpness in comparison to best aperture. So stopping down is not so necessary as in the past.

Ok, it makes sense now. Thank you everybody.

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