Thread Rating:
  • 1 Vote(s) - 5 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Two new lenses for Pentax !!
#44
In my boredom I glanced on the old site ..... Rice High's Pentax blog ....... I was still wondering about the different resolution results between the brands ..... of the Tammy and the K mount version

.... then interestingly, according to a Chinese lens review it shows how Tamron's  optical elements were positioned slightly differently to accommodate Pentax's AF  SDM ring motor in their FA 70-210mm F4 lens....... it is also claimed that the same optical elements were used ... just moved slightly ....... also the coatings are seemingly different ....

   That would certainly explain ephotozine's differing resolution results between the two brands and Cameraville's findings ....... 


  Rice High's site:

http://ricehigh.blogspot.com

  ....... a shame that Pentax had to fiddle with the formula just for their SDM motor at the price of sharpness at the long end ...... 


Hmmm ......
Dave's clichés
  


Messages In This Thread
Two new lenses for Pentax !! - by davidmanze - 01-22-2020, 06:36 AM
RE: Two new lenses for Pentax !! - by davidmanze - 01-22-2020, 09:01 AM
RE: Two new lenses for Pentax !! - by Klaus - 01-23-2020, 04:37 AM
RE: Two new lenses for Pentax !! - by toni-a - 01-23-2020, 06:49 AM
RE: Two new lenses for Pentax !! - by thxbb12 - 01-23-2020, 09:03 AM
RE: Two new lenses for Pentax !! - by Kunzite - 01-23-2020, 11:31 AM
RE: Two new lenses for Pentax !! - by Klaus - 01-23-2020, 12:36 PM
RE: Two new lenses for Pentax !! - by davidmanze - 01-24-2020, 10:03 AM
RE: Two new lenses for Pentax !! - by Kunzite - 01-24-2020, 09:02 PM
RE: Two new lenses for Pentax !! - by davidmanze - 01-25-2020, 07:17 AM
RE: Two new lenses for Pentax !! - by mst - 01-25-2020, 07:41 AM
RE: Two new lenses for Pentax !! - by Kunzite - 01-25-2020, 11:46 AM
RE: Two new lenses for Pentax !! - by davidmanze - 01-26-2020, 09:31 PM
RE: Two new lenses for Pentax !! - by Kunzite - 01-27-2020, 09:05 PM
RE: Two new lenses for Pentax !! - by davidmanze - 01-28-2020, 02:08 PM
RE: Two new lenses for Pentax !! - by Kunzite - 01-28-2020, 02:59 PM
RE: Two new lenses for Pentax !! - by Kunzite - 01-28-2020, 03:57 PM
RE: Two new lenses for Pentax !! - by davidmanze - 01-28-2020, 04:59 PM
RE: Two new lenses for Pentax !! - by Kunzite - 01-28-2020, 05:21 PM
RE: Two new lenses for Pentax !! - by Kunzite - 01-28-2020, 06:45 PM
RE: Two new lenses for Pentax !! - by Kunzite - 01-28-2020, 09:32 PM
RE: Two new lenses for Pentax !! - by Kunzite - 01-29-2020, 11:35 AM
RE: Two new lenses for Pentax !! - by mst - 01-29-2020, 01:15 PM
RE: Two new lenses for Pentax !! - by Kunzite - 01-29-2020, 01:22 PM
RE: Two new lenses for Pentax !! - by Mistral75 - 01-29-2020, 01:50 PM
RE: Two new lenses for Pentax !! - by Kunzite - 01-29-2020, 02:59 PM
RE: Two new lenses for Pentax !! - by Mistral75 - 01-29-2020, 03:09 PM
RE: Two new lenses for Pentax !! - by Kunzite - 01-29-2020, 03:54 PM
RE: Two new lenses for Pentax !! - by Kunzite - 03-27-2020, 11:56 AM
RE: Two new lenses for Pentax !! - by davidmanze - 05-02-2020, 07:36 PM
RE: Two new lenses for Pentax !! - by Kunzite - 05-02-2020, 09:43 PM
RE: Two new lenses for Pentax !! - by davidmanze - 05-03-2020, 09:24 AM
RE: Two new lenses for Pentax !! - by toni-a - 05-03-2020, 04:37 AM
RE: Two new lenses for Pentax !! - by Kunzite - 05-03-2020, 07:03 AM
RE: Two new lenses for Pentax !! - by thxbb12 - 05-03-2020, 01:05 PM
RE: Two new lenses for Pentax !! - by thxbb12 - 05-03-2020, 01:30 PM
RE: Two new lenses for Pentax !! - by thxbb12 - 05-03-2020, 04:20 PM
RE: Two new lenses for Pentax !! - by Kunzite - 05-03-2020, 04:38 PM

Forum Jump:


Users browsing this thread:
2 Guest(s)