Hi Joseph, I have the older non-Super version of the APO and it is good - the current Super supposedly is better still. The APO versions are better just at the long end, otherwise the performance is quite similar. The older APO at 300 is very sharp in the center (maybe even sharper than the current one) but not so sharp at the edges and I suppose the weighting system of Photodo test reflects just this. All the best! Raimo Personal photography homepage at http://personal.inet.fi/private/raimo.korhonen
-----Alkuper�inen viesti----- L�hett�j�: Joseph Tainter <[EMAIL PROTECTED]> Vastaanottaja: [EMAIL PROTECTED] <[EMAIL PROTECTED]> P�iv�: 28. joulukuuta 2001 3:13 Aihe: Two Sigma Zooms >I've been thinking of extending my lenses to include a 100-300 zoom. One >weakness of these seems to be softness at 300 mm. Sigma has a couple of >lenses that I find interesting: > >1. 100-300 f4. It's a constant aperture f4 and was reviewed well by Pop >Photo, but is big, heavy, and expensive. I carry a heavy camera bag as >it is. > >2. Sigma 70-300 f4.0-5.6 APO. I dug out Pop Photo's review of this in >the March 2000 issue. In their MTF tests, it seems to do quite well at >300 mm. It is also lightweight and $219.00. Do I want to spend nearly >$700 more for one f-stop at 300 mm.? > >So, I'm wondering what users of lens #2 think of it's performance at 300 >mm.? > >Incidentally, there are two similar varieties of this 70-300: one APO, >one not (Sigma calls it the DL). Pop Photo says the APO is appreciably >sharper. PhotoDo seems to rate them just the opposite, giving the APO a >rather low rating. So I really need some users' experiences. I am >generally making 8 x 10 inch enlargements on my Epson 870, and at that >magnification softness shows.. > >Thanks, > >Joe >- >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 . - 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 .
