D7000 apeture not / maybe working?

JC565

New member
I finally got my first real camera. Took years. Ex wife wouldn't let me buy one so i had to replace her first. New wife let me buy 2! Lol


Anyways, I'm not using the best lens first off. I was given a sigma 28-80 f2.8-5.6 macro. I took two shots. Both at 80mm. Subject close to camera (7 feet). Back ground objects (trees) about 70-100 feet away. Both shots properly exposed at 100 iso.


First shot was at min aperture (f33 i think it showed) with a slower shutter, second was at max aperture (f5.6) with faster shutter. I used the shutter speed to make both slow 0 on the meter without changing iso since it was very bright out.




Both images looked identical in the background (not in focus but little to no bokeh) The command dial does show an aperture change numerically, but i can't see it on the photo. Manually moving the aperture shows an error and the shutter won't release.


Am i doing something wrong , or is it my lens, or is there a way to manually control it without the error? I really only want to make sure the camera works properly since it's an e-bay special


Thanks for your input in advance!
 
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nickt

Senior Member
I'm not familiar with this lens. It sounds like it has an aperture ring. If so, it needs to be set at the minimum aperture (f32?). There might be a physical lock on the lens to keep it set there. Also check menu f6, customize command dial - aperture setting, set it to 'ON'. This is an obscure menu setting and usually nobody messes with it, but check it out and be sure its ON.
Now with the aperture ring set at minimum (highest #) and f6 menu set properly, the aperture should be controlled by the front command wheel. Test this in Manual mode or aperture priority mode to see the numbers in the camera change without error. Then try some pictures again.
 

JC565

New member
nickt,

thanks for the reply. I read on another forum last night about the f6 custom setting, and that did allow me to adjust the aperture ring manually. Doing it manually, there was no significant difference in the background, so right now I can only assume the camera is doing its job. I have a 35 1.8 on order so maybe that will give me a better tool to work with.

This is the best I could do with it.....Now mind you. I am no photographer. This is the first "pro" camera Ive ever held in my hands, much less shot with. (i know.. semi pro) This is the first picture I got out of it that i was happy with, and it was a bit dark out so im satisfied with my purchase.

DSC_8260 by JC Biggs, on Flickr



(not sure how to rotate it..sorry) and yes.. i know there is a dead pixel on her face lol. ill fix it later.
 
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Blacktop

Senior Member
I finally got my first real camera. Took years. Ex wife wouldn't let me buy one so i had to replace her first. New wife let me buy 2! Lol


Anyways, I'm not using the best lens first off. I was given a sigma 28-80 f2.8-5.6 macro. I took two shots. Both at 80mm. Subject close to camera (7 feet). Back ground objects (trees) about 70-100 feet away. Both shots properly exposed at 100 iso.


First shot was at min aperture (f33 i think it showed) with a slower shutter, second was at max aperture (f5.6) with faster shutter. I used the shutter speed to make both slow 0 on the meter without changing iso since it was very bright out.




Both images looked identical in the background (not in focus but little to no bokeh) The command dial does show an aperture change numerically, but i can't see it on the photo. Manually moving the aperture shows an error and the shutter won't release.

Am i doing something wrong , or is it my lens, or is there a way to manually control it without the error? I really only want to make sure the camera works properly since it's an e-bay special


Thanks for your input in advance!

It would be helpful if you post both of these shots. F/33 and f/5.6 shots should show a significantly different looking background.
 

JC565

New member
These were taking with the command dial controlling the aperture. looking at it on my 4k monitor, there is a small difference. but not much. These particular photos were 3.5-22 range. as i noticed on the image posted above.. when you use the 80 end of the lens, it does a little better. I cant find the comparison pictures i took on the 80 end back to back. but it was the same... not alot of difference, even manually controlling the aperture. (photo above was manual aperture.)

DSC_8217 by JC Biggs, on Flickr


DSC_8218 by JC Biggs, on Flickr
 
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Bikerbrent

Senior Member
Welcome aboard. Enjoy the ride.

I have never used this particular lens, however, the fact that the shutter speed had to be changed on the two chair shots (as shown by EXIF data) would seem to indicate that the aperture is actually being adjusted (plus, on the large view, you can see a little blurring of the background and both shots are properly exposed). The portrait picture does look like the aperture and depth of field is working properly. I really don't believe you have a problem.
 

nickt

Senior Member
I agree, looks like it is working. Changes in dof will be less noticeable at greater distances. Try a fairly close subject with background a few feet behind. You should be able to see greater changes in the background blur. Enjoy.
 

JC565

New member
Got it.. thanks.. like i said i just wanted to make sure it was fully functional and i believe it is...now i can sell this second camera that i accidentally won the auction on. lol

Thanks everyone.
 
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