Have you considered the Samyang 14mm f2.8? (full frame and by what I've read so far very good VFM).

Samyang will also be releasing a 10mm at some point.

So I'm a happy K-7 user trying to resist deals on the k-30 body and k-5 body (thinking of waiting another gen might be best on that front).

I currently have the

18-55mm wr
50-200mm wr
35mm f2.0 fa favourite lens so far, colours seem something else (what are the other lenses with colour rendering like this?)
100mm wr

I'd like a wide lens (possibly fish), but funds aren't unlimited.

Things I've been contemplating

16-45mm
samyang 8mm fish
samsung or pentax 10-17mm
samyang 10mm if/when it comes out


Things that seem good but are steep ££

15mm
12-24mm


One idea was to get the 8mm fish and get something later to complement it.
With the 16-45mm would the f4 be a concern on the K-7? I've been using the 35mm f2 recently mainly...

I'm also interested if this is still going. But I realise I'm 2nd in the cue.

Got a 35mm FA f2.0 on here 2nd hand. Been very impressed with it on my K7.

Colours seem outstanding to me, AF is pretty quick and the lens itself isn't that big.

Noticed this comparative review

https://www.pentaxforums.com/reviews/pentax-12-24mm-lens-comparison/the-bottom-l...#

Does the 15mm F4 prime come out better than these at 15mm?

Quite liking the creative shots ive seen with the Fish Eyes (the Samyang 8mm FE and the Pentax 10-17mm FE). Need to find a shot at each focal length on the pentax somewhere.

>>No, 35mm is 35mm, the same factor applies to all lenses.

But the FA is full frame and the DA not.. surely the FOV is different between these two on the K7?

unless im misunderstanding .. hence the 35mm DA suggestion.. just over a 100 quid for an extra stop over the 18-55mm.. and although not wide it should get a reasonable amount in the image

samyang 8mm FE wide and cheaper than a zoom.. but f3.5

I tried 60x 30sec exposures [with stacking] on the 18-55mm WR with ISO 400 and F4 @ 18mm on a K7 ..

I'm not sure about the balance of FOV/speed at the moment for this

more images might of helped slightly

so currently ive got

18-55mm WR
35mm FA f2.0 ~ 52mm in reality (on K7)
100mm WR
50-200mm WR

the 35mm is great but its not wide enough for this application (star trails and image stacking)... 18-55mm WR needs more speed

do you think the 35mm f2.4 DA would fair well? it is 35mm on K7 right?

the Samyang 8mm FE had crossed my mind even though its F3.5

trying to keep cost down too which makes it harder...

lots of options

the Samyang 8mm FE looks worth investigating also

Prime is fine

rosesred

same apertures and filed of view only 3 degrees less
Angle of view 83 - 35 o 86 o

http://www.lenstip.com/porownaj.php?co=obiektyw&ile=2&add0=318&add1=822

I wonder if the optical quality of the 15mm would be massively noticeable over the 16-45 @ 16mm

Usage would be star trials and infrequent urban stuff

What are the options if you aren't willing to spend for the 15mm Pentax f4.0?

Looking for something similar focal length but cheaper.