Quote:
Originally Posted by Joe
Hi Dafi,
There are several options to get a similar sort of magnification, and produce some excellent digi photos.
May I suggest one
step one; Buy a Canon 350D (8mpixel) or 400D body (a little more expensive but 10 mpixel)
Look for these items secondhand
Tamron SP500mm mirror lens, Tamron SP convertor , Canon EF/eos mount for Tamron. these items are no longer available new (except mount)
But it'll get you similar magnification without spending thousands
just a thought?
hope this helps
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I'm afraid your interpretation of image magnification is way out, first of all a 500mm lens coupled to a 1.4 converter only gives you 700mm, if you then multiply this by 1.6 which is obtained from using a Canon EOS 350D or 400D DSLR (sensor size ratio), you have a fixed maximum telephoto of 1120mm. The Tamron 500mm lens that you quote is a fully manual mirror lens with a fixed aperture of f8, with the 1.4 converter attached it becomes f11. I doubt also that you will have any metering modes through the camera, necessitating the need for a separate hand held exposure meter. The image magnification available when digiscoping, using a conventional spotting scope and a digital compact with built in zoom lens is far greater than this.
nirofo.