Nikon D3100 settings

[mrstraighty]

Was using this camera last year and can not recall the settings to get the aperture fully open. I can't take a picture as it says "subject too dark."

[Steve Ward]

Page 77 ... http://cdn-10.nikon-cdn.com/pdf/manuals/kie88335f7869dfuejdl=-cww2/D3100_EN.pdf

[mrstraighty]

Once the camera lens has been removed and its mounted to a t ring, the aperture adjustment is not functional. I seem to recall searching for days last year and stumbled upon the solution but do not remember what it was. Thanks for the reply though.

[happy-kat]

The aperture blades are in the lens you removed.

Need the camera in manual mode when attached to the telescope.

The f speed of the telescope is your aperture.

[Steve Ward]

Once the camera lens has been removed and its mounted to a t ring, the aperture adjustment is not functional. I seem to recall searching for days last year and stumbled upon the solution but do not remember what it was. Thanks for the reply though.

You made no mention of the camera being attached lensless via a t-ring ... 

The camera will need to be set to Manual mode as opposed to one of the automatic modes.

[mrstraighty]

Yeah I should've been more detailed. So I had my setup working great last year. Took my avatar photo with it. I am mounting to the scope via T ring. I then have a 2" tube that goes directly into the lens mount. Camera is in manual mode. The camera will not allow any adjustment to the aperture in any mode but, I know last year I was in manual mode. I searched and eventually found on the web that  there is a setting in the camera that tells it allow the aperture to be adjusted. Just gotta find it RRRRRR! It was a most obscure post on some weird page. Should've saved it. I do appreciate everyone's input.

[Steve Ward]

With no lens attached you cannot adjust the aperture setting , the aperture is determined by the telescope and is fixed.

On my Canons the Aperture is displayed as F0.0 , you just adjust exposure via the ISO and Exposure settings.

[mrstraighty]

Yeah, I'm beginning to think that I am not remembering correctly how I had it set up last year. I will try again with it as it is. I actually got a 2 sec exposure of Betelgeuse that seemed relatively clear. The real problem is that my remote will activate the shutter and I thought that was the culprit. You have any insight on that?

[mrstraighty]

Will NOT activate the shutter I mean.

Yeah, I'm beginning to think that I am not remembering correctly how I had it set up last year. I will try again with it as it is. I actually got a 2 sec exposure of Betelgeuse that seemed relatively clear. The real problem is that my remote will activate the shutter and I thought that was the culprit. You have any insight on that?

w

[happy-kat]

Doors the remote ever activate the shutter?

And is it literally a remote by wifi or blue tooth or by cable?

[knobby]

Turn remote shutter release on in settings , it doesn't stay on and times out if not used for I think about 15 minutes

[mrstraighty]

I am a moron. Had the autofocus settings on.