WWhen Your Eyes Don't Do What They Used To

[leon]

Hi All

I have a very interesting question.

30 years ago my eyes were good, and i focused on what i wanted and did Astro-Photography, with film, and the results were good.
As you, grow older you end up with, GLASSES.

To make it all short, here is my question.

OK.

I focus my scope, with camera attached, find what I want to photograph and make critical adjustments with my glasses off through the view finder in the camera.
Now, I put my glasses on to find the remote button, and press, for one exposure.

Because I focused with my glasses off, (and it looked ok to me)..........

How dose the camera see it.

[33South (Chris)]

I have the same problem, Im forever taking my glasses on and off, I dont view with them on but need them to read the handbox, camera controls etc.

I would guess it will be out of focus, based on the fact that I need to change the focus when sharing an eyepiece view.

For terrestrial shots with MF you need to set the dioptre adjustment correctly on the camera viewfinder if you dont want to wear glasses to focus, the same should hold for astro-imaging. Do most ? cameras have this, mine does.



Ah the beauty of AF.

[alan meehan (Alan)]

hi leon
i have the same problem myself,how do your pictures turn out,maybe we should try focusing with our glasses on

A focus is a focus no matter what method you use, even if your eyes dont come to complete focus doesnt mean your camera or scope doesnt. If you focus in and out and obtain the clearest image your eye's can resolve then the image will be as sharp as is possible, your eye's may not see it but the device will, camera's included. Dioptic correction at the eyepiece doesnt affect the film plane, in an SLR it is corrected after the focal point of the collecting lens, it is only beneficial for your eye, not the image.

[jjjnettie (Jeanette)]

I'd like to see two pictures taken of the same object, one with glasses on, one with glasses off. Then we would be able to compare the results.
Interesting thread.

[leon]

Now that's a good idea, i'll be doing that the next time i'm imaging