Forgot Password
Pentax Camera Forums Home
 
Log in or register to remove ads.

Showing results 1 to 25 of 300 Search:
Forum: Monthly Photo Contests 06-08-2021, 09:11 AM  
Hedgehog cactus
Posted By SCGushue
Replies: 19
Views: 186
I would like to nominate this photo
Forum: Monthly Photo Contests 06-01-2021, 01:47 PM  
Dreamy Dandelion
Posted By SCGushue
Replies: 7
Views: 121
I would like to nominate this photo
Forum: Monthly Photo Contests 06-01-2021, 01:44 PM  
Dappled Lantern
Posted By SCGushue
Replies: 18
Views: 223
I would like to nominate this photo
Forum: Monthly Photo Contests 06-01-2021, 01:44 PM  
Dance
Posted By SCGushue
Replies: 14
Views: 166
I would like to nominate this photo
Forum: Monthly Photo Contests 05-31-2021, 04:19 PM  
Waters' Edge
Posted By SCGushue
Replies: 35
Views: 492
Forum: Monthly Photo Contests 04-12-2021, 03:36 PM  
Portrait
Posted By SCGushue
Replies: 43
Views: 672
I would like to nominate this photo
Forum: Winners' Showcase 04-12-2021, 03:36 PM  
March, 2021 Runner-up: Look from the Past
Posted By SCGushue
Replies: 98
Views: 2,146
I would like to nominate this photo
Forum: Winners' Showcase 09-01-2020, 04:25 PM  
August, 2020 Winner: Timeless
Posted By SCGushue
Replies: 153
Views: 3,273
A tour de force!
Forum: Monthly Photo Contests 03-15-2020, 05:50 AM  
North Rim - Grand Canyon
Posted By SCGushue
Replies: 28
Views: 731
I would like to nominate this photo
Forum: Monthly Photo Contests 03-15-2020, 05:49 AM  
Grand view
Posted By SCGushue
Replies: 19
Views: 521
I would like to nominate this photo
Forum: Monthly Photo Contests 03-15-2020, 05:48 AM  
Landscape in Monochrome - Enders Falls
Posted By SCGushue
Replies: 16
Views: 606
I would like to nominate this photo
Forum: Monthly Photo Contests 03-15-2020, 05:46 AM  
Country Road
Posted By SCGushue
Replies: 28
Views: 698
I would like to nominate this photo
Forum: Monthly Photo Contests 02-16-2020, 07:39 PM  
Factory Butte
Posted By SCGushue
Replies: 22
Views: 528
Forum: Monthly Photo Contests 02-06-2020, 04:30 PM  
Nice a..pple!
Posted By SCGushue
Replies: 12
Views: 362
I would like to nominate this photo
Forum: Monthly Photo Contests 02-06-2020, 04:29 PM  
Summer Burger
Posted By SCGushue
Replies: 26
Views: 676
I would like to nominate this photo
Forum: Winners' Showcase 02-06-2020, 04:28 PM  
January, 2020 Winner: Gindungo Cahombo
Posted By SCGushue
Replies: 70
Views: 2,501
I would like to nominate this photo
Forum: Pentax Medium Format 01-16-2020, 05:11 AM  
645 lens on K mount with 1.4 TC
Posted By SCGushue
Replies: 9
Views: 836
The 645 120, in both A and FA are fantastic lenses. I perhaps, favor the 120 A for my style of work. That said, although it does produce beautiful images on the K mount, it is quite cumbersome to use due to the lack of an automatic diaphragm. Itís just too dark to view and focus when stopped down. Both lenses do still function and produce outstanding images on all iterations of the 645ís.

I too have a number of macros, 35, 50, 100, 180 and find them much easier to use on a K mount. Since purchasing the 645z, however, I find that I am very comfortable using the Z with the 120 A for nearly all my macro work.
Forum: Pentax Medium Format 01-15-2020, 07:20 PM  
645 lens on K mount with 1.4 TC
Posted By SCGushue
Replies: 9
Views: 836
I think the hole is a straight 3/8 ..... but please donít hold me to that.

The plate that I am using for the 645 A*600 is 6.5 inches.. I find that it gives me the stability I need to move the lens into balance on my Markins Q10 or the Wimberley gimbal..

Glad to post the images even though they are not scientific. My commitment to posting made me try to locate the 645 to K adapter that I hadnít been able to locate for the past six months. It was frustrating me. Finally found it attached to the Sigma 1.4X. Go figure.

You will find that focusing with a TE on this lens is a challenge as it goes dark. And the increased focal length makes stability an issue.....which I think is an issue on some of my images.

Please post your findings. I look forward to seeing some images.

Stephen
Forum: Pentax Medium Format 01-15-2020, 02:11 PM  
645 lens on K mount with 1.4 TC
Posted By SCGushue
Replies: 9
Views: 836
I finally found the 645 to K adapter.

Here are some quick shots, nothing scientific, utilizing the Pentax 645 *600mm lens on a K-5 with a 645 1.4X, 2X and a Sigma 35mm APO 1.4X extender. Image exposures varied due to dynamic changes in outdoor lighting. But hopefully, you will get the jist of the images.

First images is of a box face using the lens without a converter.

Second images is the Sigma APO 1.4X converter. (Looks quite nice in my opinion)

Third is with the 645 1.4X. Different lighting and subject top possible focus issue

Fourth is with the 645 2X. Subject to the same conditions as the 1.4X.

All shots on K-5 at iso 1600 at f8, mounted on a Gitzo GT5540LS and Wimberley Gimbal.
Forum: Weekly Photo Challenges 01-13-2020, 05:54 PM  
Weekly Challenge CAPTION CONTEST Now through January 19 2020
Posted By SCGushue
Replies: 17
Views: 1,465
Sadly, only 40% of the flock managed to paddle past a gauntlet of submerged head hunting alligators.
Forum: Pentax Medium Format 01-12-2020, 10:02 AM  
645 lens on K mount with 1.4 TC
Posted By SCGushue
Replies: 9
Views: 836
I have used the 645 1.4 and 2x adapter with my 645 *600. The 1.4 is very good on the small sensor K5. The 2x is not too bad either. It was not quite up to the image quality of the A*1200 I had, but it did the job when I needed the extra focal length. I have yet to put it on my K1ii. Perhaps i will give both a shot today and report back to you. That is if I can find the 645 to K adapter I have misplaced 😂.

Sorry, I donít have the current K 1.4 so I canít help you there.

Stephen

---------- Post added 01-12-2020 at 10:04 AM ----------


Iíll second your comments. Very accurately stated.
Forum: Pentax Medium Format 01-11-2020, 05:19 PM  
Post your medium format photos!
Posted By SCGushue
Replies: 17,422
Views: 2,819,320
Nice image Mike.
Forum: Weekly Photo Challenges 01-07-2020, 07:16 PM  
Caption Contest Jan 4-11 2020
Posted By SCGushue
Replies: 17
Views: 1,285
Please hurry..... you know Iím only paper trained.
Forum: Weekly Photo Challenges 12-29-2019, 02:09 PM  
Caption Contest 26 December 2019 - 4 January 2020
Posted By SCGushue
Replies: 17
Views: 1,260
Dang..... it’s times like this I wish I was a Rockhopper penguin. Dang!!!!!
Forum: Monthly Photo Contests 12-26-2019, 06:48 PM  
On the Alert
Posted By SCGushue
Replies: 0
Views: 173
Search took 0.01 seconds | Showing results 1 to 25 of 300

 
Forum Jump


All times are GMT -7. The time now is 05:11 AM. | 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