Originally posted by TerryL Hello,
I want to get involved in Landscape Photography. I have the K-1 and three FA Limited lens and FA 100mm macro. I love wide angle and would like something wider than my 31, but maybe not an UWA lens. It would be great if it were a Pentax lens. In terms of IQ and sharpness, which is best between the 20mm, or 20-35? If I can't find one, then a third party 20mm. I plan to get a Lee Foundation System to use on all of them. Does this kit give me a decent start into Landscape Photography? Your thoughts are appreciated.
Terry
As far as I have tried (I have the M20/4 and tried the FA20-35), a good copy of the FA20-35 is better edge to edge stopped down vs the M20.
The problem is getting a good copy.
The copy I tried was decentered on one side (the good side was sharp on the edges), another copy I know of seemed 'off' and prone to flare.
M20/4 is a great lens in real world use, when portability is also a consideration.
Its not too sharp on the far edges and corners, but decent enough and often when distortion correction, perspective correction and very slight cropping for composition is done, the far edge has been cropped away anyway and a non-factor.
It also needs f11 to get decent edges, but a non-factor in practical use since thats all I care about as a landscape lens.
I have seen a good copy of the voigtlander 21mm that was better on the edges than my M20, but I also know of 2 copies of this lens that are the same as the M20.
As far as I know, if you want absolute edge to edge performance for a 20-21mm prime, then its the Zeiss 21/2.8.
But since they don't do PK mount anymore, your best option is to get one in Nikon F-mount and have the mount swapped via a Leitax adapter.
As for filter kits, I think there are other brands out there that do the job for a cheaper price.
I am using Haida filters and they work well.