I presume you are going to use this lens with bellows for macro work? You would probably be better off just using the 50 mm and bellows. A 2x teleconverter will turn your 50 mm lens into a 100 mm lens but it will not be a macro and the image quality will inevitably decline. It is the flat field and close focusing that makes a true macro. I don't know of any teleconverter that does that.
A close up filter is another option. Cheap and effective (depending on what you are doing), but you still don't get a flat field. A close up filter is not really a filter but an extra element (or group if they are a compound structure) which is added in front of your front lens element. You can also try using your existing lens with a reversing ring.
If you decide to get a teleconverter of any kind, remember that if it is a third party offering, a 7 element design should give a better result (and cost much more) than the 4 element designs. A Pentax teleconverter would probably be your best bet.
Peter Brisbane
From: Christopher Comer <[EMAIL PROTECTED]> Reply-To: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Teleconverter Question Date: Thu, 29 May 2003 17:07:08 -0400
Hello, I was wondering if anyone would like throw in a recommendation for a decent budget teleconverter. I would like to use it with my smc-a f/2 50mm and try some macro work. I know you get what you pay for and I'd like to know what to look for in the used market say around $50-$75. Thanks for your help.
-Chris
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