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04-30-2010, 11:32 PM   #1
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Help with promaster 500mm

WILL A PROMASTER SPECTRUM 7 500MM LENS FIT ON A K100D IF NOT CAN YOU HELP SUGGEST HOW TOO,

THANKS

04-30-2010, 11:53 PM   #2
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Promaster markets lenses for many different camera brands. Noone can tell whether a lens will fit a particular camera without looking at the lens, or at least a photo of the rear of the lens (where is it attached to the camera). Can you post a photo (or photos)?

Is there any marking near the rear of the lens? That may help too.
05-01-2010, 02:49 AM   #3
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Is this a Mirror lens or is one of those Telescope type lenses (similar to this)

05-01-2010, 08:26 AM   #4
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It should say in the description of the lens whether it's for Pentax or not. If it is, then it fits. Unless it says it for Pentax "screw mount" or M42, in which case it needs an adapter. Do realize thatit's almost certainly a manual focus lens, probably manual exposure too - that should also be stated in the description.

Some - probably most - 500mm lenses are actually "T-mount", meaning with the proper adapter it will fit any SLR. Sometimes it can be worthwhile to buy a lens that says it for one type of camera, then simply replace the T-mount adapter ($15 at most camera stores). But depending on the seller, they might not be aware that the lens they are selling is actually a T-mount lens with an adapter for some other system, rather than a lens actually for that other system only.

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