rosuna Posted July 31, 2007 Share #41 Posted July 31, 2007 Advertisement (gone after registration) Two lenses at different apertures and FoVs shouldn't be compared. The 75mm Lux allows a shorter exposition time, and more FoVs at the same distance (or more distance for the same FoV). Link to post Share on other sites More sharing options...
Advertisement Posted July 31, 2007 Posted July 31, 2007 Hi rosuna, Take a look here 75mm Lux/Cron or 90mm Cron what do you recomend ?. I'm sure you'll find what you were looking for!
Jack_Flesher Posted July 31, 2007 Share #42 Posted July 31, 2007 Two lenses at different apertures and FoVs shouldn't be compared. The 75mm Lux allows a shorter exposition time, and more FoVs at the same distance (or more distance for the same FoV). And that's precisely why I included the crop from the 75 at f2 and roughly the same image size as the 90 Cron! (You may have posted before I was done uploading?) Also, as anybody that has ever tested any camera gear will tell you, there are ALWAYS naysayers in the crowd that will complain about how the test was done regardless of how you did it -- even more especially when your results disagree with their perceptions! Personally, I feel that anybody who takes the time to post images with crops is giving other readers more information than they had otherwise, and thus the "post" is beneficial regardless... Cheers, Jack Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted July 31, 2007 Share #43 Posted July 31, 2007 Jack i would keep the 90 mm . Honestly i have more lenses than I need but damnit I just can't sell any of them. LOL having way too much fun shooting this system and just love the character from the different glass. i have 2 90mm now the cron and macro which don't let anyone fool you the 90 macro lens is awesome and extremely underrated but slow Link to post Share on other sites More sharing options...
Jack_Flesher Posted July 31, 2007 Share #44 Posted July 31, 2007 But the 75 at f2 is VERY nearly the same as the 90 at f2. Seems like a lot of glass to carry for being so close in look... I am for sure keeping the 75 due to its having the added "look" of f1.4, but with it in the bag, I'm not sure I'd ever carry the 90 -- ??? Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted July 31, 2007 Share #45 Posted July 31, 2007 Well can't argue about carrying it around also. I leave some home and than I feel guilty:D Link to post Share on other sites More sharing options...
Jack_Flesher Posted July 31, 2007 Share #46 Posted July 31, 2007 Well can't argue about carrying it around also. I leave some home and than I feel guilty:D You feeling guilty? ROTFLMAO!!! Here is a shot showing the relative sizes: Link to post Share on other sites More sharing options...
carstenw Posted August 1, 2007 Share #47 Posted August 1, 2007 Advertisement (gone after registration) Jack, if you have a little time, could you do a shot of foliage against the sky? I have a feeling that the 90AA has less CA than the pre-Asph, but wanted to quantify it a bit. Link to post Share on other sites More sharing options...
rosuna Posted August 1, 2007 Share #48 Posted August 1, 2007 And that's precisely why I included the crop from the 75 at f2 and roughly the same image size as the 90 Cron! True. Sorry Jack. In any case, if you reduce the distance, the performance of the lens is reduced too. Link to post Share on other sites More sharing options...
Jack_Flesher Posted August 1, 2007 Share #49 Posted August 1, 2007 Jack, if you have a little time, could you do a shot of foliage against the sky? I have a feeling that the 90AA has less CA than the pre-Asph, but wanted to quantify it a bit. Here you go. I think it's a safe assumption that ANY non-asph lens will have more under-corrected spherical aberrations than an asph, and moreover, any true APO will (or at least should) exhibit less CA than a non APO. HOWEVER... I find that in the case of Leica M glass, these differences are mitigated significantly at stopping down just a few stops from wide open. And let's face it, we typically are not shooting into direct high-contrast edges in bright light with our lenses wide-open, more likely dong that with the lens stopped down a bit. And more likely we shoot wide open in darker light where the problem does not occur as often. FWIW, these are 750x750 px crops out of a full-frame shot. The tree is 30 meters away. So here is the 90 Pre-Cron wide open at f2: And here it is one stop down at f2.8. Note how much the little CA that was there to begin with is essentialy gone. At f2.8 this lens is already outperforming the excellent Elmar f2.8. I have no doubts the 90 AA is better from a pure technical point of view, but this lens has some character to itthat is maybe missing from the AA -- and this Pre-AA is no slouch on performance as-is IMO: Link to post Share on other sites More sharing options...
agro Posted August 2, 2007 Share #50 Posted August 2, 2007 I wish I could afford Lux, but so far simply loving 75 Cron (the 30% off deal). I must agree with Jack. I do have 90 Macro and will use it for macro only. 75 and 90 are so close. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/29660-75mm-luxcron-or-90mm-cron-what-do-you-recomend/?do=findComment&comment=318751'>More sharing options...
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