Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
02-17-2016, 09:34 AM   #16
Junior Member

Join Date: Feb 2016
Posts: 27
Original Poster
so far I figured out I get motion blur in mixed light with 1/125s.
If I shoot in available light, 1/125s is to slow for a portrait with 150mm. 1/400 would be better and save at 1/640s. I dont know if I shake or if it's the models, or both.
Slower speeds are just a bit to much random in sharpness, even on tripod.
Now the next problem, I found the pentax lenses get better when I stop down even beyond f8. So for now I end up turning up the iso like 3200 or 6400, or using flash to overpower ambient light significantly.

I have 35HD(great at any aperture), 55mm(can't tell to much yet, kind of inconsistent, to many factors for conclusions), 75mm(needs at least f8), 150mm(starts to get good at f8 and beyond, needs high shutters).
The 90mm would be an option, but price and weight let me doubt, if it's worth to get it.

I also wonder currently, if a continous light solution with fresnels would make sense for this system. It would certainly create more mood. They do not have the amount of light though to shoot at f8/ 1/640 and ISO400 though I need to measure this.


  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
645z, forum, hasselblad, pentax, versions
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Past the 10k mark on my Pentax 645z, user review rcdurston Pentax Medium Format 33 10-14-2014 04:13 PM
Pentax 645Z User Review jonojono Pentax Medium Format 6 07-21-2014 06:37 AM
New Pentax 645Z user Immerdraussen Welcomes and Introductions 5 07-17-2014 11:10 AM
Price is Relative: New Pentax 645Z dms Pentax Medium Format 2 05-04-2014 04:00 PM
Long time Pentax user, new forum user mamethot Welcomes and Introductions 7 08-02-2012 11:19 AM

All times are GMT -7. The time now is 06:39 AM. | See also:, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]