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Old Monday 28th September 2015, 13:39   #2
Cristian Mihai
Cristian Mihai
 
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Join Date: Apr 2007
Location: Bucharest
Posts: 16,349
This is a mirror lens. This type o lens provide a lower quality image (comparison with the usual ones). On the other hand, the price is very low. So, if you want to take record shots, this could be an option. f6.3 it is not such a narrow aperture. Using relative high values for ISO (800 or 1600), you'll achieve acceptable shutter speeds.
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