Trouble setting f/stop through dissecting scope setup
Moderators: rjlittlefield, ChrisR, Chris S., Pau
Trouble setting f/stop through dissecting scope setup
This is my first post so thanks to the admin for accepting me.
I am very much an amateur but have been photographing insects through a Swift dissecting microscope with a trinocular eyepiece for many years. I use a Niikon D-90 attached to a MEIJI TECHNO tube with a photo eyepiece. Suddenly I am no longer able to set an aperture. I am shooting using manual mode and Live View. I can change the shutter speed and ISO but the f-stop just refuses to be set. All I can see is "f--". So far I have reset the camera to factory defaults but to no avail. I also tried shooting in Aperture Priority and Shutter Priority but nether will allow me to shoot. Note that the camera works fine with a regular lens (off of the microscope).
Any help greatly appreciated.
I am very much an amateur but have been photographing insects through a Swift dissecting microscope with a trinocular eyepiece for many years. I use a Niikon D-90 attached to a MEIJI TECHNO tube with a photo eyepiece. Suddenly I am no longer able to set an aperture. I am shooting using manual mode and Live View. I can change the shutter speed and ISO but the f-stop just refuses to be set. All I can see is "f--". So far I have reset the camera to factory defaults but to no avail. I also tried shooting in Aperture Priority and Shutter Priority but nether will allow me to shoot. Note that the camera works fine with a regular lens (off of the microscope).
Any help greatly appreciated.
Re: Trouble setting f/stop through dissecting scope setup
Welcome to the forum !
Manual lens ?HollyR wrote:...Note that the camera works fine with a regular lens (off of the microscope)....
Re: Trouble setting f/stop through dissecting scope setup
Yes, it works fine with a manual lens and always worked fine with this same setup in the past. Obviously I have done something dumb.Saul wrote:Welcome to the forum !Manual lens ?HollyR wrote:...Note that the camera works fine with a regular lens (off of the microscope)....
Re: Trouble setting f/stop through dissecting scope setup
"On the D90 lens mount, at about 8 o’clock, there is a switch that senses the minimum aperture."HollyR wrote:Yes, it works fine with a manual lens and always worked fine with this same setup in the past. Obviously I have done something dumb.Saul wrote:Welcome to the forum !Manual lens ?HollyR wrote:...Note that the camera works fine with a regular lens (off of the microscope)....
What about this switch ?
Re: Trouble setting f/stop through dissecting scope setup
What about this switch ?
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Well, seems like a good idea but I tried it in both positions and it didn't do anything.
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Well, seems like a good idea but I tried it in both positions and it didn't do anything.
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Re: Trouble setting f/stop through dissecting scope setup
I'm confused about your setup.HollyR wrote:TI use a Niikon D-90 attached to a MEIJI TECHNO tube with a photo eyepiece. Suddenly I am no longer able to set an aperture.
I think of a "photo eyepiece" as being something that projects an image directly onto a camera sensor, with no other lens on the camera. In that case there's no aperture that can be adjusted, or at least none that the camera has control over.
Can you clear up my confusion? What aperture are you trying to adjust?
--Rik
Thanks to all of you for excellent suggestions. I am throwing in the towel. I know I am missing something, probably a menu setting but for the life of me can't find it. To answer your questions, I am shooting in the manual "M" mode, the only other "lens" is the optics of the microscope, and as far as a short goes I am not adept enough to figure that one out. If I should ever figure it out I will let you know.Pau wrote:Maybe you must set the AF-M camera lever to M.
(I haven't a Nikon DSLR so I'm just guessing)
In the meantime, thanks for the help!!! (and for the welcome to the forum)
Holly, you were never actually controlling any f-stop, so the fact that you can't control it now should not cause you any new problems.
I just checked my D90 and it works fine with no lens, but only if the left-hand upper dial is set to M. I see you have it set at that; maybe try switching modes and then switching back?
I just checked my D90 and it works fine with no lens, but only if the left-hand upper dial is set to M. I see you have it set at that; maybe try switching modes and then switching back?
Hi Lou,Lou Jost wrote:Holly, you were never actually controlling any f-stop, so the fact that you can't control it now should not cause you any new problems.
I just checked my D90 and it works fine with no lens, but only if the left-hand upper dial is set to M. I see you have it set at that; maybe try switching modes and then switching back?
I think you can save your D90 settings to the SD card ? If it is true, you can transfer them to the PC and send to Holly
https://www.nikonusa.com/en/learn-and-e ... smart.html