View Single Post
Old 27th March 2009
dbutch's Avatar
dbutch dbutch is offline
Full member
Join Date: Nov 2007
Location: Yateley, Hampshire
Posts: 652
Thanks: 46
Thanked 29 Times in 19 Posts
Likes: 21
Liked 13 Times in 9 Posts
Re: My "road map" for new lenses

Originally Posted by petrovich View Post
Sorry to carry this on but if you have a 35mm Macro plus 25mm ext does this give you a bigger distance between you and bug/flower and possible reduces f number etc....
Any ideas on distance increase...


If you add the EX-25 to the 35mm macro I believe you will end up with a very short working distance, I believe I have heard mentioned that it can be differcult to utilize the max magnification it offers.
The use of the extension tube does not affect the f number.

I you used one of the tele convertors they can work as a resonable close-up tool as they retain the min focus distance but of course magnify the image, down side is a/ expensive & b/ you lose 1 to 2 stop depending on which is being used.

Another thing that is worth remembering is that the min focus distance given is from the film/sensor plane so adding a ex-tube or convertor eats into that space.

Reply With Quote