Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
12-21-2019, 04:51 PM - 1 Like   #151
BruceBanner's Avatar

Join Date: Dec 2015
Posts: 5,201
Original Poster
QuoteOriginally posted by Dartmoor Dave Quote
Personally I prefer to shoot portraits of people in an environment that reveals something about their personality, and I like to have the background pretty much in focus.
Just depends on what you're doing and what you want to achieve. I don't think there is a hard fast rule, depends much on the scene. This would be one of my favourite environmental portraits taken this year;


Another example;


I kinda feel the f2 works well here, there is clear focus on the subject and the wide aperture works for a layering effect. It just depends really what you (as the photographer) want to do and the intended message put across.

12-21-2019, 06:02 PM - 2 Likes   #152
photoptimist's Avatar

Join Date: Jul 2016
Photos: Albums
Posts: 4,532
QuoteOriginally posted by swanlefitte Quote
Equivalence confuses.
That seems extremely true, but isn't entirely fair.

It's not equivalence that confuses. It's the seemingly confusing relationships between format size, focal length, aperture, field-of-view, and depth-of-field that confuse people.

Anyone trying to decide whether they should buy M4/3, APS-C, FF, or MF will face the confusing issue of how different formats require different focal length lenses and different apertures to create a certain look (e.g., wide/normal/telephoto shots and shallow/deep DoF shots). Sure, if someone has one camera and no intention of buying a different format or trying to learn how to make photographs taken with a different format, then these format issues are irrelevant. But buyers, switchers, and comparers do face the confusing effects of format.

Equivalence is actually an attempt to reduce that confusion. Alas, trying to explain equivalence beyond saying "just shut up and use the crop factor on the focal length and aperture" seems require delving into all the confusing factors of exactly how format size, focal length, and aperture combine to create a particular field-of-view and depth-of-field.

Last edited by photoptimist; 12-21-2019 at 07:22 PM. Reason: typo

  • 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!
aperture, change, crop, diameter, exposure, fa77, ff, ff lenses, format, fov, image, k-1, k-mount, length, lengths, lens, lenses on crop, pentax lens, post, ratio, sensor, site, size, slr lens, terms
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
FF mode - DA15 - crop factors & crop sizes acoufap Pentax K-1 21 05-10-2018 09:49 PM
On aperture equivalence: are FF lenses on crop bodies a bad idea? disord3r Pentax SLR Lens Discussion 13 05-02-2016 01:43 PM
Now that FF is here and what do we do with the cropped DA lenses? pento57mm Pentax Full Frame 63 04-11-2015 07:05 PM
Eleven years ago we were attacked so we get to do whatever we want forever! boriscleto General Talk 8 10-02-2012 07:07 AM
Calculate macro magnification on crop sensor Vranx Pentax SLR Lens Discussion 17 07-25-2011 12:27 AM

All times are GMT -7. The time now is 01:21 PM. | 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]