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Old Dec 10, 2009, 3:12 PM   #21
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I don't follow you there. The Sony 500mm f/8 is Autofocus (as is the Minolta Maxxum 500mm f/8, which shares the same lens design). ;-)
OK Jim. I must have smoked my lunch??? I appreciate your pointing that out and no i see that the only real issue is fixed focal length. i plan to check some of the pros over there and have a look through a lens @ 500mm.

T'anks. Bob
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Old Dec 10, 2009, 3:13 PM   #22
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The 'multiplier' Sarah refers to is the result of the fact that most dSLRs use a smaller image sensor than the size of a 35mm film exposure of 36mm x 24mm. As a result, a 500mm lens on most dSLRs has a narrower angle of view than it would on a 35mm film camera or a dSLR with a 'Full Frame' image sensor. Since the APS-C size image sensor in most dSLRs is 2/3 the size of a 35mm film exposure, it would have 2/3 the angle of view, which would give it the same angle of view as a lens with a 1.5X longer focal length. So a 500mm lens on an APS-C dSLR would have the 35mm equivalent focal length of 750mm.

And while a fixed focal length lens is less flexible than a zoom lens, your subjects are quite a distance away from you, so it's not such a big deal. And you can always crop. Plus, a catadioptric lens will give you better image quality than an inexpensive telephoto zoom lens plus a teleconverter, and will be smaller, lighter and cheaper than a high quality zoom lens with a longer range.

And the third party catadioptric lenses are a cheap way to get a super-long lens.

See the sample images for the Sony and Minolta 500/8 lenses at:

http://www.dyxum.com/dforum/forum_posts.asp?TID=11513

http://www.dyxum.com/dforum/forum_posts.asp?TID=11342
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Old Dec 10, 2009, 3:28 PM   #23
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...You'll have to decide if 500mm is a good focal length for you or not...
P.S.

Note that a 500mm on a dSLR with an APS-C size sensor is going to give you roughly the same angle of view that you'd have using a 750mm lens on a 35mm camera.
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Old Dec 10, 2009, 3:31 PM   #24
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I see that TCav already pointed out the narrower angle of view (I didn't refresh the screen to see his post before I posted again). :-)
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Old Dec 10, 2009, 9:45 PM   #25
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thanks Jim and T-Cav... Can you put "angle of view" in a simple way (duh!). Thank you.
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Old Dec 10, 2009, 9:49 PM   #26
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BTW I just reread T-Cav's explanation and can 'see' angle of view a little bit.

top Maui performer Wille K
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Old Dec 10, 2009, 9:59 PM   #27
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When I was in Maui, Loggins and Messina had just broken up.

Is Jim Messina still around?
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Old Dec 10, 2009, 10:16 PM   #28
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When I was in Maui, Loggins and Messina had just broken up. Is Jim Messina still around?
Hey! I don't know and haven't had the pleasure of meeting or seeing him yet. Mick Fleetwood, Walter Becker, Willie Nelson, Pat Simmons, Alpha Blondy, Ziggy Marley, Alice Cooper, Carlos Santana and many more come around or live here part time. I personally love most of Kenny Loggins and Jim Messina's stuff (even the movie themes and Pooh Corner).

Maui's own Reggae man = Marty Dread
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Old Dec 11, 2009, 8:41 AM   #29
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Alice Cooper!

Also when I was there, I got tickets to an Alice Cooper concert that was cancelled because they wouldn't let him bring his Boa Constrictor.
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Old Dec 11, 2009, 9:19 AM   #30
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When I was in Maui, Loggins and Messina had just broken up.
The first time they broke up, that is.

Everywhere you go, you'd hear their hit "Lahaina". Of course, I don't know if it was a hit anywhare else, but it certainly was there.
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