Need help from someone who understands optics

[westivanhoe]

I came to this beginners corner in the hope I could get help from someone
who understands optics. I am interested in digiscoping wild life I have a
scope and a digital camera. My problem is that with the eyepieces
I have (all long eye relief and fairly narrow field of view) I get too much
"vignetting" to have useful pictures. Scopetronix has produced a 1.25"
eyepiece which they called their 'MaxView' 40. It is a variable projection
eyepiece and adapter for digital cameras. The eyepiece eyeguard can be set to any height matching eye relief to what is required and providing a
wide field of view. This product is no longer available. I have scoured
the Web looking for one. In fact, I have posted classified ads on this
web site and others all to no avail. So, my question, - is there another
way to accomplish very low eye relief (camera lens almost touching
the eyepiece lens) and at the same time having a fairly wide field of view?
I believe it is possible to have the camera too close to the eyepiece -
so the adjustable feature of the Maxview would be great to have. Any
help would be greatly appreciated. Fred

[budguinn]

Ivan.....I think they are still available.....The first thing I ever bought was one for my Nikon 5700 and 4500.

here is their site:

http://www.scopetronix.com/

It appears with a quick search on "maxview" that a bunch of stuff comes up....contact them and see if they can help you out.

best regards,

bud

[pizwiz]

I don't know your setup, so can only comment in general terms.
I do a lot of afocal imaging with my Kodak 7630 point and shoot camera.
I use the scopetronix adapter kit for this camera with my own 1.25 eyepieces.
These adapters hold the lens very very close to the eyepiece. (only a few mm's ). If a certain eyepiece produces vignetting, I use the camera's optical zoom (stay away from digital zoom) to eliminate it.
The amount of eye relief doesn't seem to make any difference. The lens is always in the same place.
Also, with very long focal length eyepieces ( around 35mm or so) vignetting can become a problem since the possible field of view becomes limited by the barrel size of the eyepiece.
For focusing I simply set the camera to infinity focus and use the scope to focus the image.
I hope this helps a little.

Adolph

[Starman1]

Your field of view will be limited by the size of the chip in your camera. But, that being said, you will not get vignetting, and you will have a decent field of view if you shoot through the eyepiece and keep the eyepiece focal length shorter than 32mm if a 50 degree field of view, shorter than 24mm if a 68 degree field of view, and shorter than 18mm if the eyepiece is an 82 degree field of view. Any focal lengths longer than this at each field size will result in narrower fields. For example, 40mm is limited to a 43 degree field of view, which is fairly narrow.
Your camera's focal plane is well back from the exterior lens, so getting the camera as close as possible to the eyepiece is recommended.
A digital camera adapter will allow you to use any camera on the telescope.

[BT Technologies]

Bud, Scoptronix has been out of business now for a couple of months. We constantly have customers that are trying to find them call us for info.

There is no other information about them or what happened.

Originally Posted by budguinn

Ivan.....I think they are still available.....The first thing I ever bought was one for my Nikon 5700 and 4500.

here is their site:

http://www.scopetronix.com/

It appears with a quick search on "maxview" that a bunch of stuff comes up....contact them and see if they can help you out.

best regards,

bud

[Gary Beal]

Hi Fred,
did you sort this out?
I just stumbled onto it, and while I was aware that Scopetronix had disappeared under the radar, I did find perhaps a similar thing here http://www.alpineastro.com/digital_p...hotography.htm
I initially looked at the Baader site, but it is in German as far as I know, and I use a translator. AlpineAstro, and Bob Luffel is easier and especially if you are in the US.
Baader also makes the Hyperion line of eyepieces, and adaptors to fit virtually every camera make. Try Bob.
Gary

[Jim Fusco]

West,
I use the CKC http://www.thefind.com/main/query.ph...epiece+adapter

This adapter will work with T6 naglers 2.5 to 11mm. You can adjust the eps so it's very close or touching if you want the camer lens. This adapter worked great with my oly c4040 and i'm using it with with my S3. The hardest part id finding the adapter ring. Now I modded this for the S3 and had my friend rethread so the adapter ring screw right on the CKC.