Gerth East Haven, US Registered since 12th Apr 2002
Tue 22-May-01 03:23 PM
"New Macro Section"
Fantastic!!!!! This is great. I guess I will kick off this section with a question. Can you use close up lenses on a Macro lens? Such as putting a +4 on a Nikon 105mm macro lens. Does anyone know how much this would degrade image quality if any? Paul
Through Perseverance Comes Perfection
PAUL K.(The Connecticut Nikonian) Through Perseverance Comes Perfection.
#1. "RE: New Macro Section" In response to Reply # 0
LAST EDITED ON May-22-01 AT 06:22 PM (GMT)
Closeup lenses and extension tubes don't really magnify, they shift the focusing range of the lens. The 105mm Micro already focuses down to a mere several inches between the lens front and the subject, at the closest focus setting. A close-up lens just gets you a few cm. closer, and a few mm. increase in subject size. Same with the tube. (I just tried a 3T and 20mm tube) To get extra magnification with the 105, use a teleconverter. Even a conservative 1.5x increases the subject size by 50%; a 2x doubles the size. The difference in quality in an 8x10, if focused and exposed properly, will be unimportant(a bit grainy), if the subject is interesting enough. The Nikon 2 element closeup lenses wouldn't affect the quality, at least in the center, if the primary lens is stopped down. ---scott
"I am always doing that which I cannot do, in order that I may learn how to do it." Pablo Picasso