Results 1 to 8 of 8

Thread: Pentax lens

  1. #1
    Member lionel lim's Avatar
    Join Date
    Mar 2011
    Location
    Ang Mo Kio
    Posts
    22

    Default Pentax lens

    Can anyone tell me pentax lens which is the sharpest ? And which pentax lens is the best to make background blur ?
    Lionelim

  2. #2

    Default Re: Pentax lens

    It's hard to say which lens is the sharpest. But from photodo tests, the F50/2.8 macro got the highest MTF among all Pentax lenses tested there.

    As to make background blury, it depends on the subject distance, background distance, focal length and aperture used. In general to shoot a closer distance target with a longer focal lens would give your blurier background. Normally a 50mm or longer focal length would be good enough to isolate background from the main subject if it's within 1 to 1.5m distance.

  3. #3

    Default Re: Pentax lens

    This would be a bad way to approach lens selection and understanding.
    Not to mention that every one has their own preference/poison and you'd end up with too many choices and suggestions.

    I suggest you do some read up on the basics of photography (eg. shutter speed, ISO, aperture )
    YouTube also has a good resource "Photography one on one" from Adorama, so don't even need to read

    Fengwei gave some good advice above on how to get less depth of field to make the background blur.


    To me most of the Pentax primes (old and new) are generally sharp (or rather sharp enough). No need to be sharpest.
    All the DA* lenses are sharp as well.
    I've only encountered really not so sharp lenses with a Sigma super zoom and a couple of odd ball no name old lenses (maybe they were just bad copies )
    Last edited by pinholecam; 21st April 2011 at 09:23 AM.

  4. #4
    Senior Member creampuff's Avatar
    Join Date
    Jul 2006
    Location
    Dover
    Posts
    5,116

    Default Re: Pentax lens

    Choose your lenses based on angle of view and intended subject.
    If you got no money to fork out for fast, large aperture lenses for subject isolation and blur backgrounds with your images, then consider these software options.
    Trust me they work.

    FocalPoint 2
    http://www.ononesoftware.com/product...ocalpoint/?ind

    Bokeh2
    http://www.ononesoftware.com/product...ocalpoint/?ind

  5. #5
    Senior Member edutilos-'s Avatar
    Join Date
    Dec 2010
    Location
    The Universe
    Posts
    5,991

    Default

    Quote Originally Posted by lionel lim
    Can anyone tell me pentax lens which is the sharpest ? And which pentax lens is the best to make background blur ?
    That's a very weird question. If I want to shoot a wide view and you give me a very sharp 200mm lens, I will stitch 400 images together to get 10mm FOV??

    You should be comparing within comparable focal lengths..

    For second question, same applies. Without a context it is hard to advise.

  6. #6
    Senior Member oceanpriest's Avatar
    Join Date
    Apr 2010
    Location
    Ghim Moh
    Posts
    3,453

  7. #7

    Default Re: Pentax lens

    Quote Originally Posted by oceanpriest View Post
    Actually the answer to both question is A*135/1.8

  8. #8
    Senior Member oceanpriest's Avatar
    Join Date
    Apr 2010
    Location
    Ghim Moh
    Posts
    3,453

    Default Re: Pentax lens

    I think they should make "I want to buy a lens" cartoon too
    http://www.xtranormal.com/watch/7304...o-buy-a-camera

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •