Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
06-28-2021, 05:41 AM - 1 Like   #16
Site Supporter
Site Supporter
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 16,921
QuoteOriginally posted by pepperberry farm Quote
as far as I can tell - no..

and I considered that when I started this new page... mainly that page's age and level of participation...

however, in the interest of keeping minimal pages on the same lens, should the threads be merged?
since i have added this as a new lens in the index, we can leave it no problem. its hard to tell with all the vivitar variants where the lines should be drawn.

as to age, never let ager of the thread put you off, because there are a lot of threads that are 10 years old, and not many post, so when you look at an old thread, sometimes you get a warning about this being an old thread. just ignore it.

06-28-2021, 05:56 AM   #17
amateur dirt farmer
Loyal Site Supporter
pepperberry farm's Avatar

Join Date: Dec 2014
Location: probably out in a field somewhere...
Photos: Gallery | Albums
Posts: 28,744
Original Poster
QuoteOriginally posted by Lowell Goudge Quote
since i have added this as a new lens in the index, we can leave it no problem. its hard to tell with all the vivitar variants where the lines should be drawn.

as to age, never let ager of the thread put you off, because there are a lot of threads that are 10 years old, and not many post, so when you look at an old thread, sometimes you get a warning about this being an old thread. just ignore it.

will do!
06-28-2021, 06:21 AM - 1 Like   #18
Pentaxian
Jonathan Mac's Avatar

Join Date: Apr 2009
Location: Madrid, Spain
Posts: 8,342
Seems you're enjoying the lens and getting good results

06-28-2021, 06:32 AM   #19
amateur dirt farmer
Loyal Site Supporter
pepperberry farm's Avatar

Join Date: Dec 2014
Location: probably out in a field somewhere...
Photos: Gallery | Albums
Posts: 28,744
Original Poster
QuoteOriginally posted by Jonathan Mac Quote
Seems you're enjoying the lens and getting good results
now that I've adjusted/tightened the rear element, I'm hoping for a break in the rain...

06-28-2021, 02:36 PM   #20
amateur dirt farmer
Loyal Site Supporter
pepperberry farm's Avatar

Join Date: Dec 2014
Location: probably out in a field somewhere...
Photos: Gallery | Albums
Posts: 28,744
Original Poster
QuoteOriginally posted by pepperberry farm Quote
now that I've adjusted/tightened the rear element, I'm hoping for a break in the rain...

seems that I've made it worse by tightening it - now it focuses waaaaaay past infinity and close up focus is amazingly soft....

I'll be putting off that calibration mess until this weekend then....
06-28-2021, 03:20 PM   #21
Site Supporter
Site Supporter
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 16,921
QuoteOriginally posted by pepperberry farm Quote
seems that I've made it worse by tightening it - now it focuses waaaaaay past infinity and close up focus is amazingly soft....

I'll be putting off that calibration mess until this weekend then....
Maybe it is missing a spacer between the lens group and the body of the lens
06-28-2021, 03:24 PM   #22
amateur dirt farmer
Loyal Site Supporter
pepperberry farm's Avatar

Join Date: Dec 2014
Location: probably out in a field somewhere...
Photos: Gallery | Albums
Posts: 28,744
Original Poster
QuoteOriginally posted by Lowell Goudge Quote
Maybe it is missing a spacer between the lens group and the body of the lens
no idea .... I'll see if my fiddling with it can correct it

if not, I may need to send if off for professional assistance....

06-28-2021, 03:57 PM - 1 Like   #23
Site Supporter
Site Supporter




Join Date: Nov 2012
Location: North Wales
Photos: Gallery | Albums
Posts: 2,556
See my repair article:

Kiron/Vivitar 28mm f2 (24mm f2) sticky iris fix - PentaxForums.com

The lens comprises two optical blocks. Remove the mount to access the rear one - it can be sticky to unscrew. Then you can inspect it properly.
06-28-2021, 04:09 PM   #24
amateur dirt farmer
Loyal Site Supporter
pepperberry farm's Avatar

Join Date: Dec 2014
Location: probably out in a field somewhere...
Photos: Gallery | Albums
Posts: 28,744
Original Poster
QuoteOriginally posted by marcusBMG Quote
See my repair article:

Kiron/Vivitar 28mm f2 (24mm f2) sticky iris fix - PentaxForums.com

The lens comprises two optical blocks. Remove the mount to access the rear one - it can be sticky to unscrew. Then you can inspect it properly.


one note - this is the Komine version, not the Kiron...
06-28-2021, 04:32 PM - 1 Like   #25
Site Supporter
Site Supporter
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 16,921
QuoteOriginally posted by pepperberry farm Quote
no idea .... I'll see if my fiddling with it can correct it

if not, I may need to send if off for professional assistance....
Think about it logically. If infinity focus is off you have changed inadvertently the focal length. Thatís why I think you have either lost or ov3 compressed a spacer
06-28-2021, 05:09 PM   #26
amateur dirt farmer
Loyal Site Supporter
pepperberry farm's Avatar

Join Date: Dec 2014
Location: probably out in a field somewhere...
Photos: Gallery | Albums
Posts: 28,744
Original Poster
QuoteOriginally posted by Lowell Goudge Quote
Think about it logically. If infinity focus is off you have changed inadvertently the focal length. Thatís why I think you have either lost or ov3 compressed a spacer
agreed...

infinity focus was a bit off before I tightened the lens block.... and I made it even more so...
06-29-2021, 02:00 PM - 1 Like   #27
Pentaxian
D1N0's Avatar

Join Date: May 2012
Location: ---
Photos: Gallery
Posts: 6,508
Some close focussing with my copy
Reply

Bookmarks
  • 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!
28mm, camera, f2, farm, flickr, komine, mc, pentax lens, sample photo, vivitar
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Vivitar MC 28mm f2 + IMAGE MC AUTOMATIC 28mm f2.8 anakhaled Sold Items 3 10-26-2017 04:16 AM
Is the Vivitar 24mm f2 PKA as good as the Vivitar 28mm f2 PKA (Close-focus by Komine) Pepe Guitarra Pentax SLR Lens Discussion 13 03-25-2016 06:50 AM
For Sale - Sold: Vivitar (Komine) 28mm f2.8 Close Focus Wide Angle PK-A mount w/ UV Filte (Worl K57XR Sold Items 2 06-20-2011 05:40 AM



All times are GMT -7. The time now is 04:24 PM. | See also: NikonForums.com, CanonForums.com 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?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top