emiliano_spagnuolo Posted September 25, 2001 Share Posted September 25, 2001 What's the differents beetween the 165 f 2.8 and the f 4 are they both the same sharpness? Link to comment Share on other sites More sharing options...
lduchamp Posted September 25, 2001 Share Posted September 25, 2001 The 165 f2.8 is much sharper than the f4. Since you didn't tell which lens you're talking about, I suppose this answer is as good as any other... ;-) Link to comment Share on other sites More sharing options...
art_haykin Posted September 25, 2001 Share Posted September 25, 2001 I have a 10" bread knife, and a 12" bread knife. Which one issharper? Link to comment Share on other sites More sharing options...
jerry_lehrer Posted September 25, 2001 Share Posted September 25, 2001 Emily What brand/make of lenses are you inquiring about? This is a general medium format group, not a mind reader group. Please try again, and be specific. Jerry Link to comment Share on other sites More sharing options...
brian_hinther2 Posted September 25, 2001 Share Posted September 25, 2001 If you're talking about the Pentax 67 lenses, the f/2.8 lens uses the camera's focal plane shutter, while the f/4 also has a built-in leaf shutter for synching flash outdoors. I believe the latter is generally regarded as the sharper of the two. Link to comment Share on other sites More sharing options...
roger_michel Posted September 26, 2001 Share Posted September 26, 2001 shame on you all for your sarcastic and unfriendly responses!! this forum used to be so congenial. it is well known that only pentax currently makes both a 165mm f2.8 and f4 for MF. the former is a double gauss type and, without going to exotic glass or aspheric elements, is about as sharp as you can get. it is tack sharp at f4. the f4 leaf lens is a special application lens, an ernostar design, and while sharp, cannot equal the performance of the f2.8. now don't blast me back, just try to be friendly to all forum inhabitants -- especially at this difficult time. Link to comment Share on other sites More sharing options...
Robin Smith Posted September 28, 2001 Share Posted September 28, 2001 Sure, it is a bit unfriendly, I suppose, and Emilia is not a native speaker, but even she must realize she should tell us what camera system or lens she is talking about - it is only common sense in any language. Robin Smith Link to comment Share on other sites More sharing options...
roger_michel Posted September 28, 2001 Share Posted September 28, 2001 robin, even accepting the fact that she made a mistake (although i think anyone who would be in a position to offer useful advice would know immediately what system she was talking about -- in that sense her question was very efficient), there was no reason to post MULTIPLE sarcastic comments to get emilia to clarify her query. there really is nothing to talk about here, let's drop it, try to be friendly in the future, and move on. unfortunately, somehow i don't think that will happen . . . . Link to comment Share on other sites More sharing options...
emiliano_spagnuolo Posted September 28, 2001 Author Share Posted September 28, 2001 Hi guys sorry for the mess, my question maybe was'nt that rigth, i perfectly know that the lens f 2.8 is for sure sharper than the f 4, the point was that the f4 has the leaf shutter so i was asking if there is a lot of differens of sharpeness beetwen them...... Thanks a lot and enjoy the beauty of photograpy ...... anyway i'm HE no SHE :) Link to comment Share on other sites More sharing options...
bob_overton Posted November 24, 2001 Share Posted November 24, 2001 You know Emiliano, you don't have to be sorry. The snotty smartasses who responded to your query with holier than though attitudes should be the ones who are sorry. I was curious about the 165 lens differences as well, take care. Bob Link to comment Share on other sites More sharing options...
patrick_drennon Posted November 26, 2001 Share Posted November 26, 2001 I have the f/4 LS and love it. Never used the f/2.8 so can't compare. Link to comment Share on other sites More sharing options...
trooper Posted November 26, 2001 Share Posted November 26, 2001 I haven't had both versions but the LS I owned was the only P67 optic I've owned that seemd a bit soft in all-around use. Emeliano and I are communicating in a secret code.... For those 2 or 3 who remain confused, we are speaking of the Pentax camera maker of Japan and their Pentax 67 medium format camera system. Link to comment Share on other sites More sharing options...
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