alan lee Posted February 4, 2006 Share Posted February 4, 2006 Hi Everyone, I have the 80mm CT Planar and been thinking about shooting closer to my subject with the help of a closeup filter. I've read that the Proxar, a one-element filter, can reduce sharpness. What do you guys think about the Nikon 3t, a two-element filter? I've heard great things about it, but couldn't find anyone who uses it with a medium format camera. Any comments are appreciated. Link to comment Share on other sites More sharing options...
q.g._de_bakker Posted February 4, 2006 Share Posted February 4, 2006 Any lens added to a well corrected lens will reduce performance.<br>The Nikon lenses are achromat doublets, which helps avoiding one type of quality reduction (colour fringes) only. They, like Proxars, do nothing to avoid sharpness reducing spherical aberration. Link to comment Share on other sites More sharing options...
Ed_Ingold Posted February 4, 2006 Share Posted February 4, 2006 You get much better results with an Hasselblad using extension rings than closeup "filters". You may also have a hard time finding an adapter for B60 to a 62mm threaded filter. A 3T is 52mm, which is a big problem (the 5T and 6T are 62mm). I use extension rings on my lenses 80mm and up with good results. KEH often has used rings at a reasonable price - http://www.keh.com/ Link to comment Share on other sites More sharing options...
curt wiler Posted February 4, 2006 Share Posted February 4, 2006 I have used both the 5T and 6T with this lens (mostly because I already had them), but I agree with the above responses. It depends what you want. Extension tubes are probably sharper, but the 5T/6T are <a href="http://www.taoslight.com/journals/02-misc/StillLife.htm">good enough</a> for many applications. Link to comment Share on other sites More sharing options...
alan lee Posted February 4, 2006 Author Share Posted February 4, 2006 Thanks, guys. I think I'd look more into the extension tubes. There are so many different sizes: 8, 10, 16, 32. Can the 80mm actually fit all of them? I downloaed the Closeup.pdf at Hasselblad, but it doesn't seem to cover all the sizes. Seems 8 is the recommended one. Is this the size you guys use? Link to comment Share on other sites More sharing options...
Ed_Ingold Posted February 4, 2006 Share Posted February 4, 2006 The more recent versions are 8mm, 16mm, 32mm and 56mm. These can be used in various combination, together with the focusing range of the lens, to give you overlapping coverage for all lenses from 80mm to 250mm. Older versions at 10mm, 21mm, etc. don't overlap as well. The book "The Hasselblad Manual" by Ernst Wildi has tables which thoroughly explain their use and ranges with various lenses. Link to comment Share on other sites More sharing options...
reinhard_scheuregger Posted February 4, 2006 Share Posted February 4, 2006 my 0.2: i love the Proxare, as a matter of fact i've got two complete sets. as you probably know you can stack them, thus getting enormous magnification for macro. never noticed any degrading no matter what the theory says - at least with my kind of shooting, portraits only. i also do own all available extensions, which keep sitting unused on a shelf. you lose light and with most Blad lenses this is a real nuisance. on top, unless you have a metered prism, you have to do your own math in order to get a decent exposure ... Link to comment Share on other sites More sharing options...
q.g._de_bakker Posted February 5, 2006 Share Posted February 5, 2006 Ah...<br><br>It's really not a matter of "what the theory says" at all.<br>It is a matter of what you see in the resulting images.<br><br>And believe me, especially with the things stacked to get "enormous magnification", you do not have to look very hard to see what these lenses do.<br><br>So i guess we have hit upon an instance of "the eye of the beholder", helped along by a hefty dose of "the other option is too much trouble" here... ;-) Link to comment Share on other sites More sharing options...
pinky_mirror Posted February 5, 2006 Share Posted February 5, 2006 Only own Nikon 5T. My experience is qiet okay with it. Especially when I use it, my assistant hold the filter in front of my CF120 lens :) It's a studio (with flash) set up so I can use speed of 1/500, hand held with winder CW. Link to comment Share on other sites More sharing options...
reinhard_scheuregger Posted February 5, 2006 Share Posted February 5, 2006 whoa! is that a flame? :-) whatever, i hope you don't mind my calling you beholder, then. again, for my type of picture taking, the difference does not matter. sharpness and fuzzy edges is not really an issue when doing portraits, now is it? and, provided it does not matter, what's the point fiddling around with extensions and a calculator. and again, they are sitting on a shelf, not because of lazyness but because of simple pragmatism. given, "my way" might not yield satisfactoy results if you'Re into macro-shooting flowers or 1:1's of your stamp collection.and if not convinced, yet, i'm more than happy to post examples ... Link to comment Share on other sites More sharing options...
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