I hope none of these questions are _too_ stupid. I have dabbled in theroy with telescope building, but it was some time ago. I have used telescopes of the smaller type. I inderstand the relationship between a film placne area and the length of lens needed to provide certain magnification, because I used SLR cameras.
Now suddenly I am using a non SLR digital camera (Oly C750) and I find that the take real tlel shots I do not wory about film plane size and distance, but use the camera as my "eye" and actually take a picture of an eyepiece. I was starting to think about removing the lens of my camera, to use ity as an "SLR" with DIY lens mounts. Do not _ever_ tell my wife <G>
I actually did this with a 50mm lens and a little webcam I have. It gave respecatble magnification, but of course poor shots. The colour was also all wrong, as the webcam's little lens had a red-coloured filter in front of the sensor, I suppose for light balance.
So. I have looked thiough a reasonable pair of Nikon 9 * 25 binoculars (well one half anyway) with the 750 zoomed all the way in. This gave me a small amount of vignetting,with an effective eyepiece dimaeter of about 13mm. It also gave a phenominal magnification! Quality? not sure, as I was hand-holding the entire thing. (No drinkies the previous night, and I could actually see something <G>)
I gather this is 10X (zoom) by 9 X (binocs) to give about the equivalent of a 4500 mm lens. I am therefore looking further <G>
I have also tried a rifle scope. It has a huge eyepiece, but is unfirtunately set up so that your eye is a way from the eyepiece when you get a decent image. This has to do with having to hold the riflle.
I have a reasonable Tokina 50-250 zoom lens..This has an object aperture of 52 mm and would therefore be quite bright at say 5X as a telescope or telephoto setup for a digicam with a power of 5:1..
Now suddenly I am using a non SLR digital camera (Oly C750) and I find that the take real tlel shots I do not wory about film plane size and distance, but use the camera as my "eye" and actually take a picture of an eyepiece. I was starting to think about removing the lens of my camera, to use ity as an "SLR" with DIY lens mounts. Do not _ever_ tell my wife <G>
I actually did this with a 50mm lens and a little webcam I have. It gave respecatble magnification, but of course poor shots. The colour was also all wrong, as the webcam's little lens had a red-coloured filter in front of the sensor, I suppose for light balance.
So. I have looked thiough a reasonable pair of Nikon 9 * 25 binoculars (well one half anyway) with the 750 zoomed all the way in. This gave me a small amount of vignetting,with an effective eyepiece dimaeter of about 13mm. It also gave a phenominal magnification! Quality? not sure, as I was hand-holding the entire thing. (No drinkies the previous night, and I could actually see something <G>)
I gather this is 10X (zoom) by 9 X (binocs) to give about the equivalent of a 4500 mm lens. I am therefore looking further <G>
I have also tried a rifle scope. It has a huge eyepiece, but is unfirtunately set up so that your eye is a way from the eyepiece when you get a decent image. This has to do with having to hold the riflle.
I have a reasonable Tokina 50-250 zoom lens..This has an object aperture of 52 mm and would therefore be quite bright at say 5X as a telescope or telephoto setup for a digicam with a power of 5:1..