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Forum: Pentax DSLR Discussion 03-28-2017, 03:47 PM  
understanding the 1.5 crop factor
Posted By Nicolas06
Replies: 37
Views: 4,674
Yep, we often think of technical possibilities. 36MP better because there more details and FF because of more dynamic range. What can benefit of it, in theory? Landscape; So a K1 wonderfull landscape body. Okey. But does it make it visibly worse with a K5 and DA15? Well likely the FF lens would have more flare, less contrast (reduced practical dynamic range) and more resolution. But the resolution, I may never see it...

The size and weight of the 15-30, as well as the price, that's another story!

The DA15, has a telescopic hood that retract inside the lens, it is 4cm long and 215g. You can always take it in the bag, in case of...


IMGP9623-HDR by Nicolas, sur Flickr


IMGP2544 by Nicolas, sur Flickr


Madrid Cathedral by Nicolas, sur Flickr
Forum: Pentax DSLR Discussion 03-26-2017, 02:13 AM  
understanding the 1.5 crop factor
Posted By Nicolas06
Replies: 37
Views: 4,674
Beside I never got why really FF cameras are supposed to be better at landscapes. The DA limited we have for APSC are about the lenses that have the best flare resistance I know of. The package in APSC is still smaller overall (whatever your lens choice) and great WA angles lenses on FF are extremely expensive.

I would agree FF is better at low light and shallow dof, in particular because f/2.8 zoom offer so much possibilities and lenses are typically better at f/4 than f/2.8 or f/2.8 than f/2...

But for landscape? We all know the resolution of a modern APSC camera is more than we need. Landscape don't move and thanks to SR I can't say low light is really an issue for landscapes... There dynamic range, true, the camera that has the most of it is D810, not K1 and that's because of its 50iso mode. a K5-IIs give you the 80iso mode, enough resolution for any printing size requirement you may have and a bunch of dedicated APSC primes that are optimized for landscape: DA15, DA21, DA40...
Forum: Pentax DSLR Discussion 03-26-2017, 02:02 AM  
understanding the 1.5 crop factor
Posted By Nicolas06
Replies: 37
Views: 4,674
It isn't. This is a compromize...

On APSC and K3 with it too long registration distance, I truely enjoy the small telelenses we get like the FA77 or DA70. To get the same framing, you need much bigger 115mm lens on FF and on APSC mirrorless the telelenses around 70-90mm with the same apperture are much bigger/heavier.

But now, if I am to shoot WA, I can see all the lenses Fuji has like 14mm f/2.8, 16mm f/1.4, 18mm f/2, 23mm f/1.4 and 23mm f/2...

What I can see is my DA21 is similar to the 18mm f/2 or 23mm f/2. The max apperture is very different and the 23mm doesn't suffer of field curvature as much.

There isn't a better registration distance, it depend what framing and focal length you tend to use the most. On mirrorless with short registration distance, teles are bigger on typically smaller body: not so conveniant. But the WA lenses end up much small, better optically, less expensive. Your choice depend of what your preferences are.
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