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Forum: Pentax K-1 1 Day Ago  
Pixel Shifted Images
Posted By jbinpg
Replies: 779
Views: 88,028
As far as I know, only the software baked into the K-1 MkII can process its own handheld pixel shift shots. Capture One is just processing the first frame thus the 35 mb file size.
Forum: Pentax SLR Lens Discussion 4 Days Ago  
HD Pentax-DA 55-300mm F4.5-6.3 ED PLM WR RE - Show us what it can do, what it CAN'T!
Posted By jbinpg
Replies: 126
Views: 6,640
This lens is at its best around f/8 at 300mm. But given enough separation between subject and background, the rounded blades lead to a nice soft background anyway.

Savannah Sparrow - Passerculus sandwichensis - habitat by Jack Bowling, on Flickr
Forum: Pentax K-1 4 Days Ago  
Back button focus customization help needed
Posted By jbinpg
Replies: 10
Views: 457
I believe the Lock function carries over into a USER mode. If not, just set everything up the way you like it then hit LOCK before handing it over to the neophyte.
Forum: Pentax K-01 07-15-2018, 01:55 PM  
Monsters on our Tomato Branches
Posted By jbinpg
Replies: 13
Views: 612
The Tomato and Carolina (Tobacco) Hornworms are quite similar looking in both larval and adult stages. Identification discussion here:

Species Manduca quinquemaculatus - Five-spotted Hawk Moth - Hodges#7776 - BugGuide.Net
Forum: Digital Processing, Software, and Printing 07-14-2018, 10:51 PM  
More Flickr Frustrations
Posted By jbinpg
Replies: 79
Views: 2,337
Firefox being a RAM hog was true before the major code review of a few versions ago. It is much more frugal now.
Forum: Pentax SLR Lens Discussion 07-14-2018, 07:45 PM  
What's your favourite vintage / film-era manual focus lens, and why?
Posted By jbinpg
Replies: 64
Views: 2,225
Super-Takumar 55/1.8 on the K-1 is my current favourite. Soft and glowy wide open but sharpens up nicely stopped down. Cannot create the equivalent rendering with modern lenses. This was at f/2.8 on the K-1 so not quite as glowy as wide open.

Peach-leaved Bellflower - Campanula persicifolia by Jack Bowling, on Flickr
Forum: Pentax K-1 07-14-2018, 07:34 PM  
K1 spot focus doesn't always spot focus
Posted By jbinpg
Replies: 16
Views: 840
I believe the Hold options only come into play in AFC when tracking is enabled. The "shutter action on first frame" options is what controls the shutter release in AFC. With AFS, there is the option which either prevents or allows shutter release if the subject is not in focus.
Forum: Pentax K-1 07-13-2018, 07:19 PM  
K-1 II AF-C Sports Report
Posted By jbinpg
Replies: 14
Views: 799
Yes, f/8 with the 55-300 PLM is much better than wide open. However, I believe this lens was optimized for close work rather than distant subjects. Its oof rendering doing pseudo-macro stuff punches above its weight class, likely helped by the rounded aperture blades and ED glass.
Forum: Pentax K-1 07-12-2018, 03:57 PM  
DSLR camera cage for K-1
Posted By jbinpg
Replies: 8
Views: 626
Try googling for 3d printed cages. All a manufactrer needs is measurements.
Forum: Digital Processing, Software, and Printing 07-12-2018, 03:49 PM  
LensFun XML guide?
Posted By jbinpg
Replies: 4
Views: 244
Hi, Mike. If I remember my uni math courses right, k is a universal shorthand for a coefficient. So your assumption is likely correct. I read recently where one of the lens correction developers is throwing in the towel re. trying to stay on top of including new lenses in the hardcoded lookup tables. Instead they have allowed users to define their own lenses locally that will be scanned and loaded during instantiation. Can't remember if this was lensfun or exiv2 but I can certainly see their point given the plethora of lenses out there with similar and confusing definitions. I assume there will be a way to also pull in matching lens corrections. - Jack
Forum: Troubleshooting and Beginner Help 07-11-2018, 06:58 PM  
150-450 DFA will not auto-focus.
Posted By jbinpg
Replies: 7
Views: 313
It takes 2 surfaces to make an electrical contact. Check the contacts inside the lens mount also and give them a good clean.
Forum: Pentax SLR Lens Discussion 07-09-2018, 10:39 PM  
HD Pentax-DA 55-300mm F4.5-6.3 ED PLM WR RE - Show us what it can do, what it CAN'T!
Posted By jbinpg
Replies: 126
Views: 6,640
I definitely agree. The rendering of this zoom is excellent. K-1 in crop mode + DA 55-300 PLM.


Yellow-head Bumble Bee on red clover by Jack Bowling, on Flickr
Forum: Pentax SLR Lens Discussion 07-09-2018, 10:24 PM  
The Bokeh Club
Posted By jbinpg
Replies: 12,543
Views: 1,176,251
Definitely one of the carrot or parsley family with the compound umbel. Since the two most deadly plants in North America are in this family (Poison Hemlock and Water Hemlock) and are well within their range in Oregon, you should try to identify this one if you can. If it has oblong reddish-purple markings along its stem, it is one of the bad ones.

---------- Post added 07-09-18 at 10:30 PM ----------

Bug bokeh. K-1 in crop mode + DA 55-300 PLM.

Iridescent wings by Jack Bowling, on Flickr
Forum: Lens Clubs 07-09-2018, 10:09 PM  
Takumar club
Posted By jbinpg
Replies: 15,724
Views: 2,813,825
Let me out! K-1 + S-M-C Tak 28/3.5 @ f/5.6.

More ponies by Jack Bowling, on Flickr
Forum: Lens Clubs 07-09-2018, 09:58 PM  
The 300mm plus lens Club discuss your long lenses.
Posted By jbinpg
Replies: 29,155
Views: 2,559,134
Hi, Albert. That is a male Black-headed Grosbeak and should be well within its normal range in your neck of the woods. Great singers!

Jack

---------- Post added 07-09-18 at 10:02 PM ----------

A male Northwestern Fritillary on red clover. K-1 in crop mode + DA 55-300 PLM @ 300mm.

Northwestern Fritillary - Speyeria hesperis - dorsum by Jack Bowling, on Flickr
Forum: Pentax K-1 07-06-2018, 09:41 PM  
"Stair casing" at 100%
Posted By jbinpg
Replies: 48
Views: 3,836
Does this also happen with pixel shift images where there is no inter-pixel interpretation?
Forum: Digital Processing, Software, and Printing 07-02-2018, 09:42 PM  
Printing with the New Large Tank Printers
Posted By jbinpg
Replies: 15
Views: 1,077
It is a good multi-function printer. Initially had problems getting one of the cartridges to print properly but it just took a deeper recharge to get it going. Will never be a proper photo printer but at least it doesn't clog.
Forum: Troubleshooting and Beginner Help 07-02-2018, 08:55 PM  
Continuous interval exposures primer needed K-3 II
Posted By jbinpg
Replies: 19
Views: 519
This was taken at last night's Canada Day fireworks. K-3, S-M-C Takumar 28/3.5 @ f/11, ISO200, 8 seconds, IR remote release, tripod. The old Tak 28 ended up being too wide for the event so this is a stiff crop. Better too wide than too long, though. Eight seconds will lead to blownout detonations as seen here but gives you longer fireworks traces. It also gives you more leeway if you are a bit too quick to open the shutter. - Jack

Forum: Lens Clubs 06-30-2018, 10:09 PM  
Takumar club
Posted By jbinpg
Replies: 15,724
Views: 2,813,825
The in-laws' 3-year old Icelandic Sheepdog. An amazing pooch. K-3 + S-M-C Tak 28/3.5


Piper by Jack Bowling, on Flickr
Forum: Pentax K-1 06-28-2018, 11:26 AM  
Post your K-1 pictures!
Posted By jbinpg
Replies: 18,393
Views: 1,554,405
Simon - Thank you for leaving some deeper shadows in your images. Too many photogs open up the shadows too much rendering the image a flat boring mess. I appreciate your post-processing vision. - Jack
Forum: Pentax K-1 06-26-2018, 12:04 PM  
Post your K-1 pictures!
Posted By jbinpg
Replies: 18,393
Views: 1,554,405
OK, people, time to stop the anti-fungal talk. Only some fungi are meant for consuming wood. Over the past 30 years, it has been established that without the vast mycelial jungle under our forests, the trees would be severely malnourished. The mycelia attach to the roots and expedite transfer of nutrients to the tree. In return, the tree provides what the fungus needs to survive. Yes, there are nasty fungi that go after some of our trees. But the good they do vastly outweighs the bad
Forum: Pentax SLR Lens Discussion 06-23-2018, 02:38 PM  
Breaking Out of the Vintage Glass "Dark Side"
Posted By jbinpg
Replies: 68
Views: 1,976
Somehow, I managed to break the focus clutch from the helicoid. Spin the focus and the elements don't move at all. Won't even manual focus.I have had it ever since it was released so time for a CLA anyway.
Forum: Pentax K-1 06-23-2018, 12:39 PM  
The Ugly Truth About Pentax AF-C (Cuteness included)
Posted By jbinpg
Replies: 123
Views: 4,286
Hi, Mike. See if you can get your hands on the DA 55-300 PLM and redo your test with it. Guaranteed the keeper ratio will be higher.
Forum: Pentax SLR Lens Discussion 06-23-2018, 12:25 PM  
Breaking Out of the Vintage Glass "Dark Side"
Posted By jbinpg
Replies: 68
Views: 1,976
I busted the focus on my workhorse DA*300 the other day. I could not go without a long lens while I sent in for repair, so I got smart and bought myself a 300 PLM. Night and day AF speed at a slight resolution loss. But I will still get the DA*300 fixed since I need it for my comet hunting. As for vintage lenses, I will never give them up. Different rendering compared to modern lenses with often more satisfaction with the finished image.
Forum: General Photography 06-21-2018, 10:47 PM  
RIP Koko. The first famous non-human selfie.
Posted By jbinpg
Replies: 8
Views: 491
Here is another link focusing on her contributions:

Koko the gorilla has died. Here's how she changed humanity for the better.

Her age at death was 46.
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