Originally posted by kparseg
Hello folks, I hope you're all doing great. I've picked up Pentax D-FA 90mm f2.8 macro lens as my first Pentax 645 lens. So, my plan now is to expand my lens collection for portraits. I'd like to ask you about your experience using Hasselblad 110 f2 lens on your Pentax 645d/z.
- The wide aperture is attractive, but how sharp is it wide open and what's the quality of bokeh?
- How easy is it to manual focus this lens? I rarely use manual focus on my Canon lenses, and unfortunately I can never get
as sharp results as with autofocus.
- Finally, if this lens is attached to the body using an adapter, does this affect the weather sealed feature of 645d/z bodies?
Thanks a lot!

i keep meaning to write some real detail about this lens on my site as it's a common question. it's the obvious fast lens to get for a 645.
here's a 100% crop at f/2.
however, thats live view on a tripod. So you can get that sharpness, it's there in the lens - but getting it in real life when handheld and focussing through view finder is tough. Basically I have lots of really nice looking shots from this lens that print beautifully and look great online but to be picky if you zoom in at 100% on the full sized file it'll be a smidgen out of focus. As a wedding guy I'm ok with this - I don't want my wedding shots to be crazy sharp.
I will say it'll be easier to manual focus than the canon gear. For example the canon 85 1.2 manual focus ring is kind of a bit sloppy/easy to move. The 110mm is one of the nicest built lenses I've ever used and the MF ring is just beautifully weighted and with the big 645 viewfinder I get on pretty well with it.
Not sure about weather sealing.
Here are a few f/2 shots I picked at random. I used to change the aperture on this lens for people shots but now just leave it at f/2 all the time. Bokeh wise my personal opinion is it's super smooth up close, and when shooting at distance the smoothness can either look great or a bit odd depending on the background. I really like how this lens looks different to everyone else using the typical canon glass.
oh one more thing, shoot it without the lens hood for some epic flare
and stoppped down, it's nice for landscapes too. something about it that just looks a bit different. contrast related I guess.
hope this helps. I use it when I'm not in a rush and can set things up - if i need to shoot faster I use the 75 or 150 for the AF.