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Forum: Welcomes and Introductions
02-05-2024, 02:56 PM
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Welcome to Pentax. You have an eye for your subject.
Something to try: Author a photo-book. Compose the 'book cover image'. Build a table of contents; a sequence of mini topics. Dawn of the work day, breakfast, the weather, both good and bad. Detailed daily prep of the machinery. First entry to the field, terrain, tactics. Supporting actors, gear and people. Mid-day break/lunch. End of the day overview of work accomplished. Twilight, bedding down the equipment. Seasonal weather and crops can make separate 'books'.
There's a potential for images submitted to local media or ag publications. Wall-hangers for the county fair photo contest and your local seed and equipment dealers.
Doing such pre-planned story-telling, assures that you're actively hunting for meaningful scenes with appropriate gear in hand and mindful exposure plans rather than just stumbling onto stand-alone snapshots.
- Imagine the eleven images that accompany this one from an abandoned ranch.
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Forum: Weekly Photo Challenges
02-04-2024, 08:38 PM
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A two-fer. Neither would tell me what they were watchin'.
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Forum: Pentax SLR Lens Discussion
02-01-2024, 09:53 PM
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Your choice of focal length can tell a variety of stories.
May I suggest acquiring an older cheap D 55-300 kit lens and using it for laboratory exercises in composition and intentional story-telling.
Both macro and tele photography are best learned as very deliberate processes so the older, economical lenses are not limiting used as 'training wheels'.
Don't limit the idea of tele lenses to simply magnification. They're a magic carpet that opens otherwise unattainable locations.
Is it the blossom or the pasture you wanted?
 
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Forum: Weekly Photo Challenges
01-06-2024, 02:59 PM
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Forum: Weekly Photo Challenges
12-19-2023, 01:12 PM
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Forum: Weekly Photo Challenges
12-03-2023, 12:15 PM
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Forum: Troubleshooting and Beginner Help
09-08-2023, 09:15 AM
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There's no such thing as 'female subjects'. They all self-identify as royalty. :hmm:
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Forum: Accessory and Memory Articles
05-20-2012, 09:09 AM
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A very useful description and images, Dan.
For those new to the M42 adapters, it's worth noting that the design of these accessories goes back to the very beginning of the K-mount transition.
They were intended to allow people with an extensive collection of M42 lenses to continue to use them while the new K-mount lenses became easily and economically available. The intent was that the adapter would be more or less permanently mounted onto the new K-body and the M42 Takumar lenses would continue to be screw-mounted as needed. There was no special concern for the security of the M42 lenses since they fit just as designed for that type of lens.
Ironically, at that time, it was the occasional use of the new bayonet lenses that was considered inconvenient as to removing the adapter! But the ability to use the new body with older lenses was very much appreciated then, especially by pros with expensive lens collections.
I find it most convenient to dedicate a body to the use of M42 lenses with the adapter semi-permanently mounted as originally intended.
I'd also note that I've removed the flange from a few top-hat style adapters so as to prevent the "extension ring effect" on focusing to infinity and semi-permanently mounted them to certain often-used M42 lenses in effect making them PK lenses but without the latching notch (which can be drilled into the base if desired in some cases). When I do that, I intentionally shave the adapter so the lens fits with the aperture index at the 10- or 2-o'clock position so the internal flash bulge doesn't interfere with reading the aperture ring. (Lens registry distance depends on the lens base-to-body fit, not a specific thread alignment for either type of mount.)
H2
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Forum: Weekly Photo Challenges
07-23-2023, 05:58 PM
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Everyone was happy but the pig.
There's great difference between being interested and being committed to a project.
The chicken's an interested observer when it comes to scrambled eggs and bacon for breakfast; the pig on the other hand . . .
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Forum: Weekly Photo Challenges
06-29-2023, 11:54 PM
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Are we gonna be like him when we grow up, Mom?
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Forum: Weekly Photo Challenges
06-24-2023, 11:14 AM
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Forum: Weekly Photo Challenges
06-12-2023, 10:41 AM
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Anti-thirstifying contraption at work
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Forum: Troubleshooting and Beginner Help
05-26-2023, 11:30 AM
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Flight (levitation) is possible only when audio-dynamic lift forces overcome the dark-side, negative-attraction of shadow forces. Positive lift forces are generated by converting fuel (avgas or kerosene) into sufficient noise that the resulting velocity vector breaks the shadow-noise barrier; that event may be observed any time light appears between tires and a runway surface.
Flight at night relies on generating and storing sufficient audio-dynamic energy during daylight operations to replicate, and sustain, shadow separation. Potential inadequate energy capture is commonly noted by intermittent 'auto-rough' engine operation of one engine in black air and/or over large bodies of water. (Note: When BOTH occur simultaneously, auto-rough operation appears to continuously affect ALL operating engines.)
This is easily explained by replacing each appearance of the word aerodynamic(s) with audio-dynamic(s) in the classic text 'Aerodynamics for Naval Aviators'. Flight is dependent upon noise decibels which must exceed the weight of all paperwork involved in certifying the aircraft for each flight.
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Forum: Troubleshooting and Beginner Help
05-27-2023, 12:17 PM
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Maybe think Fibonacci or geometric or...
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Forum: Pentax Q
11-25-2015, 09:07 AM
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Here's the Tamron/Adaptall SP 500/f8 on the Q. The 350/5.6 should be even better and more useful. There's also an Adaptall to Q adapter rather than the PK-AD + P-Q set-up. Results on the Q7 are even better.
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Forum: Troubleshooting and Beginner Help
02-23-2020, 02:48 PM
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As always, focal length depends on what you're trying to accomplish. In general, any quality lens between 35 -135mm will serve as a start. The longer the FL, the narrower the field of view and the greater the working distance from the subject.
Bellows/macro photography is normally a very deliberate process and depth of field is minimal (fractions of an inch) so a fast lens isn't necessary. A classic, economical Pentax SMC f 1.8/50 or 55mm lens would be a fine start. The learning curve is steep and a solid mount/tripod and good lighting are crucial.
Many on-line resources are available for reference:
Macro by any means necessary club
The MaQro Qlub! |
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Forum: Weekly Photo Challenges
04-24-2023, 08:29 PM
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Forum: Weekly Photo Challenges
03-29-2023, 07:42 AM
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Forum: Weekly Photo Challenges
03-17-2023, 10:22 PM
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Forum: Weekly Photo Challenges
02-15-2023, 08:47 PM
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Sunset - Manila Bay, P. I. 1965. Image scanned from Spotmatic 35mm slide.
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Forum: Weekly Photo Challenges
01-25-2023, 01:32 AM
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Forum: Weekly Photo Challenges
01-20-2023, 10:33 AM
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Jus' waitin' . . . he'll call today for sure.
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Forum: Weekly Photo Challenges
03-08-2021, 09:22 PM
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Watchin' the pasture critters.
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Forum: Mini-Challenges, Games, and Photo Stories
12-13-2022, 12:45 PM
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I'd consider the possibility that the early efforts may be chemical-based 'mining' rather than mechanical methods. E.g., electrolysis, distilling, enzyme action, photosynthesis, etc. That may be more accessible using a source of atomic power or solar generation (which may be more effective without earth's atmosphere).
If there's H2O in any form extracting usable amounts of hydrogen and oxygen would be a start.
I'm guessing medieval stone masonry may become of interest again though. Diesel and wood's certainly not gonna be an available fuel or construction material. And IME, operating large dump trucks requires a significant daily ration of beer too. :hmm:
[ And an interesting read: 'What if the Moon Didn't Exist', Neil F. Comins ]
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Forum: Weekly Photo Challenges
11-30-2022, 03:13 PM
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Pretty much nothing but primary colors an' contrast here...
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