How to pre-set aperture on a detached e-mount lens?

Susurs

macrumors 65816
Original poster
Jun 18, 2010
1,090
5,127
Hi!

I was wondering if the only possible way to set and maintain a specific aperture value when a lens (SEL50F18) is detached from Sony e-mount body is to detach the lens while camera is ON? I red somewhere that the last pin on the mount supply’s power to lens, so there cannot be issues (except dust) - is it so?

P.S. Another question - can anyone share the experience with a Sony lens (probably SEL50F18) reversed + extension tubes for macro photography?

Thanks!
upload_2017-7-10_14-0-52.png
:)
 
Last edited:

Stefan johansson

macrumors 65816
Apr 13, 2017
1,294
606
Sweden
There are manual lenses for Sony e-mount,Samyang manufacture some really good ones,with mechanical aperture setting on lens,all you need to do,is to set the camera to A mode.
 

Susurs

macrumors 65816
Original poster
Jun 18, 2010
1,090
5,127
Thanks! ;) For now, however, I have 2 lenses which set aperture automatically.
 

Susurs

macrumors 65816
Original poster
Jun 18, 2010
1,090
5,127
I do understand this, thanks, ;) but it is not an option at the moment. The question is how to correctly do it with the automatic lens.
 

Stefan johansson

macrumors 65816
Apr 13, 2017
1,294
606
Sweden
I do understand this, thanks, ;) but it is not an option at the moment. The question is how to correctly do it with the automatic lens.
Set camera to "A" mode,set aperture with camera settings,and leave the camera in A mode. On modern automatic lenses for e-mount,there are no aperture settings on the lens itself,the settings is always done from the camera. With a manual lens,it's always done with the aperture ring on lens.
 

kenoh

macrumors demi-god
Jul 18, 2008
5,401
8,244
Glasgow, UK
I would go buy a Canon FD50mm f1.4 (or 1.8 as it is cheaper) and a cheap adapter off ebay.... then it is manual where you need it. Also a Canon 50mm f3.5 macro lens is a cracker. I paid £50 for mine.
 

simonsi

macrumors 601
Jan 3, 2014
4,849
716
Auckland
Hi!

I was wondering if the only possible way to set and maintain a specific aperture value when a lens (SEL50F18) is detached from Sony e-mount body is to detach the lens while camera is ON? I red somewhere that the last pin on the mount supply’s power to lens, so there cannot be issues (except dust) - is it so?
Lenses stay at rest with the aperture wide open, only stopping down to the required value while the camera takes the image so detaching the lens with power on, irrespective of the mode in which the aperture is being set on the camera.

The only specific lenses I'm aware of where you can do this would be F-mount Nikon pre-G (so with a manual Aperture ring) and then only if you manually hold the mechanical coupling lever so simulating what the body would be doing while taking an image).

In general I wouldn't recommend attaching/detaching lenses with body power on, it may never cause an issue but live pins can always find a way of being shorted and it <may> then cause an issue that will be expensive to fix.

Just my $0.02
 
  • Like
Reactions: kenoh

Susurs

macrumors 65816
Original poster
Jun 18, 2010
1,090
5,127
E-mount lens powers down with aperture closed.
 

simonsi

macrumors 601
Jan 3, 2014
4,849
716
Auckland
E-mount lens powers down with aperture closed.
Then likely it powers down fully closed, not at the setting selected - have you verified that? Worth checking even if it does appear to stay at a mid-setting, that it truly stays there irrespective of lens handling.
 

Susurs

macrumors 65816
Original poster
Jun 18, 2010
1,090
5,127
Setting aperture to a desired value and then removing lens while the camera is ON works fine for me.