Re: FA 50mm f/1.4 vs. 50mm f/1.7 (bellows)
Dan Scott wrote: My favorite general purpose lense is an FA 35/2 AL, although I just acquired an A 50/1.7 to use with my bellows. This is an important comment. If I remember correctly, the bellows manual says that the 50mm 1.4 and the 1.2 lenses are not suited for the bellows. I don't know why, but maybe one should take that into consideration. Best wishes Wieland - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
Re: FA 50mm f/1.4 vs. 50mm f/1.7
A scroll of mail from [EMAIL PROTECTED] on Mon, 29 Jan 2001 10:51:09 +0800 Read it? y I propose to buy a 50mm lens for general purpose. Would you give me any opinion on the f/1.4 and f/1.7 lens? In reality, I seldom use the aperture larger than f/2.0. So the f/1.4 and f/1.7 have no difference for me. Rather, I wish to choose an optically good lens. Kung Hei Fat choi, Frankie! I've got an FA1.4 and an M1.7 and find them both very nice, although I prefer the 1.4 as it's AF, although the picture quality doesn't seem to be very different. If you can find the FA1.4, you should be able to get one for about hkd 1500 secondhand. I think Matsuya Camera (http://home.hkstar.com/~matsuya/) has some manual focus examples. They're ok - a reputable shop. Don't let the location put you off! dave - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
Re: FA 50mm f/1.4 vs. 50mm f/1.7 (bellows)
My favorite general purpose lense is an FA 35/2 AL, although I just acquired an A 50/1.7 to use with my bellows. This is an important comment. If I remember correctly, the bellows manual says that the 50mm 1.4 and the 1.2 lenses are not suited for the bellows. I don't know why, but maybe one should take that into consideration. I've also heard that the 1.4 and 1.2 lenses are not the ones to use for macro. And I can confirm that my A 50/1.7 is an excellent macro lens when used with extension tubes. I think it's not so much that the 1.4 is bad but that the 1.7 is better. (We all know about the 1.2, of course. Who wants *that* lens in their collestion? Not moi! sniff) - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
Re: FA 50mm f/1.4 vs. 50mm f/1.7 (bellows)
Wieland wrote: Dan Scott wrote: My favorite general purpose lense is an FA 35/2 AL, although I just acquired an A 50/1.7 to use with my bellows. This is an important comment. If I remember correctly, the bellows manual says that the 50mm 1.4 and the 1.2 lenses are not suited for the bellows. I don't know why, but maybe one should take that into consideration. Hi Wieland, That's why I had to find something other than my FA 35/2 AL to use with this Auto Bellows-A. From the Special Notes section of the Auto Bellows-A Slide Copier-A manual: "1. The wide-angle lenses up to 35mm and the 40mm f/2.8 lens are excluded from the close-up tables. For such wide-angle lenses with short focal lenghts and high-speed lenses are not suited for close-up work of high magnification, unless they are used in reverse. The extension of the Auto Bellows A is 38mm or more. Therefore, if a wide-angle lens, 35mm or less, is used with the bellows, the magnification exceeds 1X. The lens should be reversed at such a time. The 40mm f2.8 lens, which provides a magnification of about 1X, should be used with the Auto Extension Tube K for close-up work. 2. Also excluded from the close-up tables are fast lenses such as the 50mm f/1.2 and 50mm f/1.4, which produce magnifications of about 1X and have unsatisfactory sharpness for flat subjects." Tables for the M and A 50mm f/1.4 mounted reversed are provided, however, so I guess the 1.4s are ok reversed. Dan Scott [EMAIL PROTECTED] - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
Re: FA 50mm f/1.4 vs. 50mm f/1.7 (bellows)
At 08:28 29.1.2001 -0600, you wrote: Wieland wrote: Dan Scott wrote: My favorite general purpose lense is an FA 35/2 AL, although I just acquired an A 50/1.7 to use with my bellows. This is an important comment. If I remember correctly, the bellows manual says that the 50mm 1.4 and the 1.2 lenses are not suited for the bellows. I don't know why, but maybe one should take that into consideration. Propably the reason is that in designing fast lenses, more tradeoffs are made regarding flat field of view than has to be with less fast lenses. After all, most photography happening at that 1.2 or 1.4 aperture is of people and 3-dimensional objects, so flat field doesn't matter so much. Also, they might be optimised for some subject-film distance, so they might perform badly under closer distances (just a wild guess here, as this doesn't happen much with prime lenses. Only with zooms, performing nice at infinity but ugly at the closest focus) What I found to be among best lenses for bellows use (and not only in my opinion, but others!) or extension tubes use are simple Tessar formulas. These were actually formulas of some of the Pentax's own Macro lenses, If I remember correctly. These give very flat field of view and high contrast and sharpness, when stopped down to middle apertures (as their maximum aperture is 2.8 or lower, 5.6 is often enough). A friend tested one tessar type from USSR as among his best lenses at macro work! (but it came from USSR, so quality was wildly jumping up and down - from the three he tested only one was great, others just "mediocre" for tessars) Also, Tessars are used for most medium-price enlarging lenses, and perform well at it. BTW, anybody actually _tried_ reversed wide angle for macro work? If not reversed, most SLR wideangles just suck at macro, but reversed might be better. They also wouldn't lose so much light to bellows factor (which is valid only for normal construction lenses. It's more for telephotos and less for SLR wideangles). I have an idea for a perfect wideangle for macro but still working on it. Frantisek - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
FA 50mm f/1.4 vs. 50mm f/1.7
Dear all I propose to buy a 50mm lens for general purpose. Would you give me any opinion on the f/1.4 and f/1.7 lens? In reality, I seldom use the aperture larger than f/2.0. So the f/1.4 and f/1.7 have no difference for me. Rather, I wish to choose an optically good lens. Frankie - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
Re: FA 50mm f/1.4 vs. 50mm f/1.7
The f1.7 is sharper at wider than f4. If I am correct, the f1.4 has 8 aperture blades while the f1.7 has 5. regards, Alan Chan I propose to buy a 50mm lens for general purpose. Would you give me any opinion on the f/1.4 and f/1.7 lens? In reality, I seldom use the aperture larger than f/2.0. So the f/1.4 and f/1.7 have no difference for me. Rather, I wish to choose an optically good lens. _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
Re: FA 50mm f/1.4 vs. 50mm f/1.7
Hi Frankie, You can see photos taken with each here, http://gemma.geo.uaic.ro/~vdonisa/lensgal.html and comments on each at http://www.concentric.net/~smhalpin/LongComments.html . They are both considered to be fine lenses. Even the A 50 f2 is very nice. My favorite general purpose lense is an FA 35/2 AL, although I just acquired an A 50/1.7 to use with my bellows. Happy hunting, Dan Scott [EMAIL PROTECTED] Dear all I propose to buy a 50mm lens for general purpose. Would you give me any opinion on the f/1.4 and f/1.7 lens? In reality, I seldom use the aperture larger than f/2.0. So the f/1.4 and f/1.7 have no difference for me. Rather, I wish to choose an optically good lens. Frankie - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org.
