Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-22-2011, 12:54 PM   #1
Senior Member




Join Date: Nov 2010
Location: Beach Haven, NJ
Posts: 176
645D amd 300mm EDIF + 1.4x converter

I found and purchased a very, very reasonable used 300mm manual focus 300mm A* EDIF. I also found a brand new (old stock) 1.4x converter for $399, & free shipping. For a new item with warranty, this also seemed very reasonable. I note in the lens data section here, that the 1.4 converter is dedicatted to the 300mm A*, but also useable with the 120mm & 200mm (which I have, but can't imagine using it with these lenses). Does anyone have 645D experience:
1) The 300mm without the 1.4X at around f11 for long distance landscape work?
2) The 300mm with 1.4X, also at f11 for long distance landscape work, or closeups of distant landscape details?
Thanks in advance
Dave in NJ
www.modernpictorials.com

05-22-2011, 05:13 PM   #2
672
Pentaxian




Join Date: Dec 2010
Location: santa monica
Photos: Gallery
Posts: 418
1.4ed if xtender

Gurtch,

I am still only in testing phase (hence the non creative photos from backyard) but i love that extender.

I took my canon FD 600mm f4.5 and converted it to 645 mount and then got that extender on there too.....

I am really excited about the long lens usefulness of this camera...........

attached two photos with extender and two without.

-672
Attached Images
View Picture EXIF
PENTAX 645D  Photo 
View Picture EXIF
PENTAX 645D  Photo 
View Picture EXIF
PENTAX 645D  Photo 
View Picture EXIF
PENTAX 645D  Photo 
05-22-2011, 05:33 PM   #3
Senior Member




Join Date: Nov 2010
Location: Beach Haven, NJ
Posts: 176
Original Poster
WOW! Sharp results...thanks for posting. Does the converted Canon FD lens cover the 645D frame? How did you adapt it?
Thanks
Dave
05-23-2011, 08:01 AM   #4
672
Pentaxian




Join Date: Dec 2010
Location: santa monica
Photos: Gallery
Posts: 418
The canon FD covers at least 55mm circle. To convert i took all the guts out of a 645 #2 macro tube and rigged in on the lens......

05-23-2011, 08:25 AM   #5
Senior Member




Join Date: Nov 2010
Location: Beach Haven, NJ
Posts: 176
Original Poster
672: very impressive. I am amazed it focuses to infinity.
Dave
05-24-2011, 06:46 AM   #6
New Member




Join Date: May 2010
Posts: 12
645D+ 300 mm A + 1.4X

I got an inexpensive used 300 mm A which proves to be a terrific lens, sharp corner to corner from f 7.1 and up.
I bought 2 weeks ago a used 1.4x which looks good. The early results are mixed, in my case. While the center is reasonably sharp, from mid-frame and out it softens noticeably. I would have probably accepted it as part of the game, but since another fellow has published his jpgs showing to be sharp edge to edge I was hoping for better.
I will make some more tests and report if different.
As it is, it would be fine for animal shooting where you only need or want the center to be sharp.

I tried to increase image size of the 300 mm w/o multiplier, in LR 33%, to be close to the 1.4X size and the difference in sharpness in the center was minimally in favor for the 1.4x and worse mid frame out. All of this at 100% on the screen which we know does not mean much for printing.
05-24-2011, 09:17 AM   #7
Senior Member




Join Date: Nov 2010
Location: Beach Haven, NJ
Posts: 176
Original Poster
Matesa: Thanks for your observations. I am traveling now to see grandkid's graduations, and will not return home until June 1, where both items will be waiting. I will post my results.
Thanks again
Dave
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!
1.4x, 300mm, 645d, camera, converter, edif, f11, landscape, medium format
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
FA*300mm F4 on 645d sergiolov Pentax Medium Format 22 02-11-2011 07:12 PM
645D + 67 300mm ED Thomas Pentax Medium Format 3 01-25-2011 09:01 AM
645D RAW Converter matesa Pentax Medium Format 13 12-29-2010 01:38 AM
DA*300mm f/4 + f 1.7x Converter wtlwdwgn Pentax SLR Lens Discussion 3 07-01-2009 11:11 AM



All times are GMT -7. The time now is 04:12 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