How to keep aperture down after detaching the lens?

[Ky Nam]

I want my 30mm lens stops down to f/4 or so when it is detached from the camera.

Is it possible to do this?

 

[kernel panic]

I don't know if this is possible. Maybe you can set the aperture to f4 while the lens is attached and then remove the lens while the camera is still powered.

 

[atarget]

kernel panic wrote:

I don't know if this is possible. Maybe you can set the aperture to f4 while the lens is attached and then remove the lens while the camera is still powered.

--
www.mirrorlessdb.com

Try it. Then reinsert the lens in the camera. Power it up and read the aperture. If it stayed the way you pulled it from camera, try different aperture stops. If it's 100% consistent, you're good.

 

[Ky Nam]

I tried that, it does not seem to work.

 

[rudeboymcc]

The aperture on the lens is changed when it's taking a photo. Otherwise it's wide open I think.

Try in M mode, set the aperture to what you want, and the shutter speed to 3 seconds. Then take the lens off while it's taking the photo (this works on my nx10).

 

[Zdman]

You either need to be pressing DOF preview or change the camera to video mode and set video to manual. You can then select the aperture and the lens will actually change to that aperture.

 

[Ky Nam]

Zdman wrote:

You either need to be pressing DOF preview or change the camera to video mode and set video to manual. You can then select the aperture and the lens will actually change to that aperture.

rudeboymcc wrote:

The aperture on the lens is changed when it's taking a photo. Otherwise it's wide open I think.

Try in M mode, set the aperture to what you want, and the shutter speed to 3 seconds. Then take the lens off while it's taking the photo (this works on my nx10).

Works. Thank you.

 

[A Fool]

Ok, it seems I'm the only one here who has no idea why you want to do that? So let me ask, why do you want to do that? Obviously you have a good reason everyone else seems to be in on, but I have no idea how or why that'd ever be useful.

 

[Ky Nam]

A Fool wrote:

Ok, it seems I'm the only one here who has no idea why you want to do that? So let me ask, why do you want to do that? Obviously you have a good reason everyone else seems to be in on, but I have no idea how or why that'd ever be useful.

I use it for Reverse Lens Macro http://digital-photography-school.com/reverse-lens-macro-close-up-photography-lesson-3

Now I have 45mm and 30mm lenses, a 45mm+30mm Reverse Lens provides 2x magnification and focus distance is 2cm, that is possible for still life handheld shot.

 

[helderjean]

Ky Nam wrote:

A Fool wrote:

Ok, it seems I'm the only one here who has no idea why you want to do that? So let me ask, why do you want to do that? Obviously you have a good reason everyone else seems to be in on, but I have no idea how or why that'd ever be useful.

I use it for Reverse Lens Macro http://digital-photography-school.com/reverse-lens-macro-close-up-photography-lesson-3

Now I have 45mm and 30mm lenses, a 45mm+30mm Reverse Lens provides 2x magnification and focus distance is 2cm, that is possible for still life handheld shot.

What reverse lens adapter do you use?
Did you have to use some kind of step-up/step-down ring with it?

I have the 30mm, and would love to reverse it

 

[A Fool]

Ky Nam wrote:

A Fool wrote:

Ok, it seems I'm the only one here who has no idea why you want to do that? So let me ask, why do you want to do that? Obviously you have a good reason everyone else seems to be in on, but I have no idea how or why that'd ever be useful.

I use it for Reverse Lens Macro http://digital-photography-school.com/reverse-lens-macro-close-up-photography-lesson-3

Now I have 45mm and 30mm lenses, a 45mm+30mm Reverse Lens provides 2x magnification and focus distance is 2cm, that is possible for still life handheld shot.

Fascinating, thanks for the explanation. I'd of never guessed that!

 

[Ky Nam]

helderjean wrote:

Ky Nam wrote:

A Fool wrote:

Ok, it seems I'm the only one here who has no idea why you want to do that? So let me ask, why do you want to do that? Obviously you have a good reason everyone else seems to be in on, but I have no idea how or why that'd ever be useful.

I use it for Reverse Lens Macro http://digital-photography-school.com/reverse-lens-macro-close-up-photography-lesson-3

Now I have 45mm and 30mm lenses, a 45mm+30mm Reverse Lens provides 2x magnification and focus distance is 2cm, that is possible for still life handheld shot.

What reverse lens adapter do you use?
Did you have to use some kind of step-up/step-down ring with it?

I have the 30mm, and would love to reverse it

Unfortunately I have no apdater.

This Coupling (Reversing) Ring should work http://www.camera-filters.com/index.php?main_page=product_info&cPath=431&products_id=6389

 

[susee]

No it's not possible..!!

 

[rudeboymcc]

Aren't they both 43mm filter threads? (so you won't need a step up ring).

 

[helderjean]

rudeboymcc wrote:

Aren't they both 43mm filter threads? (so you won't need a step up ring).

But I found no 43mm reverse lens adapter for sale. Only 49mm, 55mm, and 58mm on eBay. Wouldn't it have to be 43mm for the 30mm lens to fit on the camera reversed?