|
Forum: Pentax News and Rumors
03-29-2017, 12:15 PM
|
| |
Maybe I'm missing something, but what exactly is so wrong with the Pentax 560mm that it could not be considered a viable alternative to a 600/f4 ? Okay, I understand it's one stop slower, but it's not such a big drawback on a camera such as the K-1. Raise the ISO one stop, and you're still as good if not better than the f4 on a Canon body. As for FL, the 40mm difference doesn't make much difference in practice. So, what more can be achieved with a 600/f4 that cannot be done with the 560mm 5.6 to the point of making it unusable for that purpose, making a 600/f4 the only way to go ? I'm asking, because I really can't see... Why wait for an hypothetical 600/f4 when a 560/5.6 is available right now ? If the reach of a 600mm is really needed, why not just get the 560 ?
|
|
Forum: Pentax News and Rumors
03-20-2017, 08:24 AM
|
| |
The benefit here isn't related directly to the format itself but to the fact that, for whatever reason, it's easier to get a high quality UWA lens for a FF camera than an APS-C one. In other words, it's a case of first selecting the lens you want and than take the body that fits with it. But you will have to spend good money to get significantly better than what you already have in APS-C.
The Fuji could be fine, but it's still APS-C and I would be very surprised if a XT-20 with the Fuji 10-24 gave much better results than the best lenses mentioned above. Looking at Photozone charts, it's not significantly better than the Sigma 8-16 (both excellent in the center but softer on the edges) at 10mm and, from 12mm, the Pentax is just as good... If you weren't happy with the results of the 8-16 or 12-24, it's not clear you would with the Fuji...
Just thinking of it. For achitecture, have you considered upgrading your K-5 to a body with pixel-shift ? I guess that with the exact same lenses you have, a 24MP, no AA, pixel shift architectural shots will look significantly better with more details than what you can get from a K-5...
|
|
Forum: Pentax News and Rumors
03-20-2017, 06:27 AM
|
| |
AFAIK, no matter the brand, you will not find significantly better on APS-C than the lenses you already tested, particulalrly if you want shorter than 10mm. There's some Tokina lenses available in Canon and Nikon mount, but the 12-24 is basically the same as the Pentax 12-24. There's the Tokina 11-20 and 11-16, but if the two Sigma or the Pentax 12-24 and 15Ltd weren't good enough for you, I doubt these Tokina will satisfy you.
If you don't mind manual focus only, the Samyang and Rokinon 10mm are well regarded.
Otherwise, FF is the way to go.
|
