Archived posting to the Leica Users Group, 1995/05/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]> The results were startlingly obvious, even in simple 4"x6" prints from the > local 1 hour joint. The Tamron and MTO were very close, with a slight edge > in detail going to the MTO; but the Vivitar was, at best, blurry - even in > the small 4x6 print! I suppose that is to be expected, for new it was just > over 1/2 the cost of the used Tamron! > > I bought the MTO, despite it's bulk, because of the superior performance, > reasonable price tab and the funky wooden case it came in (complete with 4 > - 77mm filters!). Try to make a picture with a uniform object - a wall, a sky, and you will see 2 stops difference between corner and center of image, if do you use this bulky tele. > Three questions, for those who are still reading... > > [1] Though engraved as a 500 f8 on the lens, the addendum sheet with it > says it's a 548mm f8.8. Is this sort of variation normal? Is normal; Russians makes REAL measurements with every MTO lens, and marked this. > > (2] All three lenses, as well 500/8's by Minolta, Leica, Nikon and my > 1000/11 Celestron all focus to beyond infinity. Does anyone where know the > reason Mirror lenses do not have an infinity stop? Temperature: when is very hot, infinity mark go over infinity at -10F. > > [3] The MTO results were virtually as good as the Nikkor's or Celestron's. > Yet the booklet lists resolution as "Central - 32 lines/mm" and "Peripheral > - 20 lines/mm". The MTO seems much better than such numbers would > indicate. Can anybody tell me why? You must make a lot of pictures, real pictures, not only tests; MTO is very, very good for his money, but...try a white wall... I have a Tamron; is 4 times more compact and is better that MTO - no fall-of at corners. Best regards, Dinu Lazar with a lot of pictures at: http://www.Romania.EU.net/clients/graph http://bucarest.com http://www.interlog.com/~corpac/canada/reportaje/index.html http://www.interlog.com/~corpac/canada/imagini.html