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Forum: Mini-Challenges, Games, and Photo Stories 2 Days Ago  
Thematic Trees
Posted By dlh
Replies: 3,302
Views: 177,706
first light
Forum: Pentax K-3 2 Days Ago  
My k3 is a lemon
Posted By dlh
Replies: 16
Views: 873
Are you sure the recall is limited by the warranty period? They're not with most products.
Forum: Mini-Challenges, Games, and Photo Stories 2 Days Ago  
Thematic Show me your ......MOON !
Posted By dlh
Replies: 604
Views: 44,582
Hey Diddle Diddle,
The cat and the fiddle,
The cow jumped over the moon.
The little dog laughed,
'cuz he didn't know
we'd all be goin' there soon!

(with abject apologies to Hank Ketcham)
Forum: Pentax SLR Lens Discussion 3 Days Ago  
K1 & 645 lenses
Posted By dlh
Replies: 14
Views: 506
Now THERE's a good question. And a related one, what about the use of M42 lenses on the K-1?
Forum: Pentax Camera and Field Accessories 3 Days Ago  
Cable identification please
Posted By dlh
Replies: 8
Views: 445
that one with the three-pin female terminator is for certain Canon models' shutter release, I think. The trrrs male terminators are generally used for headphones with a microphone built-in.
Forum: Lens Clubs 5 Days Ago  
Mid-Telephoto Club 100mm-200mm
Posted By dlh
Replies: 19
Views: 1,323
DA 50-200: a rope, a ladder, and the rain.
Forum: Photographic Industry and Professionals 03-19-2019, 02:47 AM  
Image is concept art
Posted By dlh
Replies: 25
Views: 737
Fascinating video. I especially liked the way the woman pronounces "out" and "about" - that used to be the way people talked in the part of Virginia I'm from, before all the foreigners from Massachussetts and New York moved in and took over. Maybe I'll move to Toronto.

What they didn't consider is that "pulling the ingredients forward" creates the impression that the patty is larger in diameter than it really is, since the viewer will naturally assume that it sticks out just as much in the back as it does in the front. It didn't occur to them that they're warranting as a contractual matter that the product will be the same as the depiction (at least in those states of the U.S. that have enacted the Uniform Commercial Code). I never thought McD's was particularly bad about their pictorial advertising, though. Like I said, I've thought that Subway and Burger King were the worst.
Forum: Mini-Challenges, Games, and Photo Stories 03-17-2019, 04:13 PM  
Thematic In Between Flowers
Posted By dlh
Replies: 37
Views: 1,486
Who cares when the weather-people say is the "official start of spring"? The crocus came up and bloomed today, so it's spring, gaul-durn-it (quoting Walter Brennan as "Gran'pa McCoy").
Forum: Photographic Equipment for Sale 03-17-2019, 05:43 AM  
For Sale: smc DA 50mm f/1.8 Lens; Pentax model 22177 - free Priority Mail Shipping via USPS
Posted By dlh
Replies: 1
Views: 309
PentaxForums.com Marketplace Listing

Item for Sale
smc DA 50mm f/1.8 Lens; Pentax model 22177

Asking Price
75.00 USD

Item Location
Broad Run, VA (United States)

Item Description
Lens includes everthing that originally came in the box, as well as the original box.

Are you the original owner of the item being sold?
Yes

Are you selling or trading this item?
Selling

Item Condition (Key)
Used
Mint

Shipping Destinations
United States

Shipping Charge
usps priority mail included

Shipping Services
usps priority mail only

Accepted Payment Types
Other (Elaborate)

Return Policy & Additional Details
lens is almost unused and believed to be in perfect condition; that said, sale is as-is/where-is, and with all its faults. Shipment will be immediate if payment by USPS money order; bank draft or check requires two weeks' processing before shipment. $20 discount for in-person transaction.

Please send me a private message if interested in the item!
Forum: Photographic Industry and Professionals 03-17-2019, 03:10 AM  
Image is concept art
Posted By dlh
Replies: 25
Views: 737
There is one, actually, but you'd have to drive three hours to get there - it's in Ashburn, Loudoun Co. Ace Photo - Ace Photo Camera Store. Very reputable, but generally higher prices than with B&H/Adorama.
Forum: Pentax SLR Lens Discussion 03-17-2019, 02:58 AM  
IRIX 15mm -- Pros and Cons
Posted By dlh
Replies: 26
Views: 1,335
agree completely, and I'd add that the Irix prime is suitable for full-frame use - the best lens Pentax had available when I bought mine that I thought was equivalent was an APS-C zoom (HD Pentax-DA* 11-18mm F2.8) that cost a whole lot more money.
Forum: Pentax SLR Lens Discussion 03-17-2019, 02:53 AM  
IRIX 15mm -- Pros and Cons
Posted By dlh
Replies: 26
Views: 1,335
I've only felt I had to use a tripod because of a slow shutter speed (photographing the astral plane). Almost all the pictures I've taken with that lens have been hand-held with what I thought were dandy results.
Forum: Photographic Industry and Professionals 03-17-2019, 02:46 AM  
Image is concept art
Posted By dlh
Replies: 25
Views: 737
Which is why we have trials, judges, and juries. The application of law to any specific set of facts depends, obviously, on what the facts are that are given in evidence (regardless of real world facts). So in your example, one important fact would be whether it's clear that it's a depiction of a vastly oversized pocket. The "Jolly Green Giant" ads were never deceptive because it was clear that the whole thing was a fantasy, and the hypothetical or theoretical "least sophisticated consumer" (the standard for evaluation of "deceptive or misleading") ought to be able to figure that out. (A similar construct to "the average man of reasonable prudence" standard applicable to cases in negligence.)
Forum: Photographic Industry and Professionals 03-17-2019, 02:36 AM  
Image is concept art
Posted By dlh
Replies: 25
Views: 737
True. Subway is the worst, I think, followed closely by Burger King. Most people don't realize that there's a legal issue at all (which is probably a good thing). And no one who knows that false advertising is worth $500 to anyone who cares to document the evidence carefully and spend (potentially) a few days in court wants to bother with it. Maybe someone who's still practicing law (unlike myself), could go find some unemployed people and give them enough money to buy themselves lunch and then document exactly what they got as well as the advertised product - since the consumer protection act promises an award of attorneys' fees.

Another problem with this kind of legislation is that judges are appointed politically, and they know which side of the bread their butter's on. Those who run the System Machinery are not the same people whom one finds in the local fast-food restaurant. Just plain folks don't get an even break for a lot of reasons. In my experience, courts don't think consumers' complaints are important, so the award of attorneys' fees reflects the courts' view of the significance of the suit. So, even though the function of the statute is supposed to be the improvement of the business climate in Virginia so that people will know they can rely on honest merchants, the courts treat consumer protection suits as next-to-frivolous (because consumers are not important people), so a lawyer might spend six thousand dollars worth of work on a case, with a resultant award of three hundred bucks (one hours' time) upon winning.
Forum: Photographic Industry and Professionals 03-17-2019, 02:20 AM  
Image is concept art
Posted By dlh
Replies: 25
Views: 737
The problem isn't that the image doesn't fairly represent the scene depicted; the problem is that it misrepresents the quality of the image that one can see on the LCD screen. They clearly didn't take a picture of the camera's LCD screen reflecting a "live view" image, they substituted a picture of much higher resolution and saturation than what you can see on that LCD screen. The LCD screen won't actually show you a picture that clear, and what they're doing by using that picture is guaranteeing that the LCD screen WILL display images of that quality and sharpness. Based on my experience with two such cameras, at any rate, unless my cameras are peculiarly defective in that respect.

The same rule applies to all advertising - even if the box of curry says, "serving suggestion", if the resultant curry doesn't look like what the picture shows, that's a violation. Seems to me there was a lawsuit a while back regarding TV advertising - I vaguely recall it had something to do with the use of mashed potatoes to simulate iced cream.
Forum: Lens Clubs 03-16-2019, 04:44 AM  
HD Pentax-D FA* 1:1.4 50mm SDM AW
Posted By dlh
Replies: 113
Views: 12,704
That third picture makes me want to go "booglerize" that little girl's tummy! (Local dialect term for the act of expressing air past moistened lips in contact with a child's abdominal surface in order to generate gales of uncontrollable laughter. And anyone under forty years of age is a child to me.)
Forum: Photographic Industry and Professionals 03-16-2019, 04:37 AM  
Image is concept art
Posted By dlh
Replies: 25
Views: 737
Where I live (Virginia), that's illegal for two reasons: first, any visual representation constitutes a warranty that the device will peform according to the picture, and warranties are cumulative (so even if they use a disclaimer, that has no effect on the fact that they used the picture to represent a quality of the device - it doesn't have anything to do with deceptive advertising, it's a contractual promise that the device will perform). And secondly, to the extent that it is deceptive, misleading, or fraudulent, that's a violation of the local consumer protection act, which provides a minimum of $500 in damages "just 'cuz", plus attorneys' fees, costs, and interest on the judgment amount.
Forum: Lens Clubs 03-14-2019, 01:29 PM  
300mm plus Lens Club: discuss your long lenses
Posted By dlh
Replies: 30,829
Views: 2,808,327
So, I manufactured a calibration tool of sorts, and took about sixty shots, varying the fine adjustment number every three shots or so, using only "live view" autofocus. Distance, about 41'. Results were all over the place. Extremely inconsistent. Finally got the best one I could get with that method (by the way, I was shooting with the camera sideways, and didn't bother to realign the image because the ruler's easier to read that way - the 24" mark is exactly even with the point of focus, and the 2x4 stud, 45 degrees off from plane of target, is eight feet long with approximately one inch increments). (I repeated some sets of test shots because the images were wildly inconsistent. I came to the conclusion that there's something wrong with the autofocus gizmo in the lens, because I tried the same thing with a 70-200 zoom (which tested perfectly at zero adj. value) and with both a K-1 and K-50 with similar results. I did get one sharper image with manual focus but still no comparison to the pictures posted on this thread. By the way, I've never messed with AF calibration before, had it turned off, because no other lens has caused any problems with autofocus.
This w/LV-AF is using an adjustment value of +4:
Forum: Lens Clubs 03-12-2019, 01:06 PM  
300mm plus Lens Club: discuss your long lenses
Posted By dlh
Replies: 30,829
Views: 2,808,327
That could be a test for color-blindness. people who ignore color as contrast data focus instead on the texture (complexity of the waveform) of the reflected light instead - and feathers don't look anything like bark from that perspective. So people who can see the birds right off are probably color-blind (as well as resolution-enhanced).

When I was in high school, they told the Army I was color blind. So the Army started twisting my arm to quit school and go to be a point-man on infantry patrols in VietNam; they figured I wouldn't be fooled by the color-camouflage (right on that point) and that I'd be able to spot the snipers in the trees long enough to shoot 'em down. Yeah, right. I figured my life-expectancy once in that job would be about fifteen minutes. That war was a big reason for my having been the first of my family to attend college (that and Lyndon Johnson's "great society" program - they were generous with student aid at that time).
Forum: Lens Clubs 03-12-2019, 05:52 AM  
300mm plus Lens Club: discuss your long lenses
Posted By dlh
Replies: 30,829
Views: 2,808,327
Thanks for that observation. Well, someone suggested shooting at a tree for detail-capture, but I figured a tree is a curved surface, so I used the neighbor's fence. Lots of detail in that; also on the dog. Clearly in the earlier attempts, the wind was a big factor. So I corrected for that, took a lot of pictures indoors, both at things in the house as well as outside through an open door (eliminating wind as a factor). Using a ten-foot extension cord on my shutter release cable so that inadvertent tugging on that wouldn't be a problem. Using a method of shooting that caused the mirror to flip up three seconds prior to the shot. Standing dead still for ten seconds prior to pushing the shutter release button (so that shifting my weight wouldn't cause vibrations in the floor - I'm pretty good at that being-still thing, being a NRA certified pistol and rifle trainer). Tried it with a K-1 and a K-50 with the same results (translated from DNG by Affinity, unprocessed, uncropped). It don' get no better'n that, I reckon.

These are the best I was able to achieve, and the all still seem have a creamy texture, to me. As if there were a thin coating of mineral oil on a lens somewhere. Nowhere near the quality of the bird pictures.

I did take a picture of a small tree, upon which I had centered the autofocus; but you'll notice that there's brush at all distances from front to back within the field of focus, and none of it is sharp.
Forum: Lens Clubs 03-11-2019, 11:59 AM  
300mm plus Lens Club: discuss your long lenses
Posted By dlh
Replies: 30,829
Views: 2,808,327
Probably not user error. I've experimented with this lens on both the K-1 and the K-50, with filters on and off, at all sorts of combinations of different shutter speeds, ISO values, and aperture settings with exactly the same results. This particular implementation of this lens cannot take sharp pictures. I called Ricoh, they're supposed to get back to me with an RMA.

Whattapain. It's taken a lot of time and effort to figure out that the thing just don't work right.
Forum: Pentax SLR Lens Discussion 03-11-2019, 04:43 AM  
IRIX 15mm -- Pros and Cons
Posted By dlh
Replies: 26
Views: 1,335
This heavily cropped image was taken with an Irix 11mm "Blackstone" on a K-1, taken from about five feet from the cat. Could have been sharper with a 50mm prime or the 100mm macro prime, I reckon. This was taken to test the lens at the extremes of anticipated usefulness, and I thought it did pretty well.
Forum: Lens Clubs 03-11-2019, 03:07 AM  
300mm plus Lens Club: discuss your long lenses
Posted By dlh
Replies: 30,829
Views: 2,808,327
Good point, thanks!

I spent years (like, 20 some odd) with no lens other than a Canon 50mm f/1.4 (AE-1), and that was a step up from an Olympus fixed-lens point and shoot. So my habits are somewhat conditioned by that limitation. I became acquainted with Pentax when in college, my "work-study program" job was "photo-lab technician" serving the art school students' photography curricula. Later, as a software engineer sharing "inside jokes", my friends and I made up improbable error messages. My experience with this super-telephoto lens is beginning to remind me of one such: "IEX09554 - Probable User Error: Meditate and Resubmit".
Forum: Lens Clubs 03-10-2019, 04:30 PM  
300mm plus Lens Club: discuss your long lenses
Posted By dlh
Replies: 30,829
Views: 2,808,327
@luftfluss, @zzeitg, @mstahulak, & @marcusBMG:

Thanks for all the comments and suggestions. Here's a couple more I did today, testing out in the yard. The neighbor's fence is about 46 yards from the camera, the dog about 28. ISO=800, f/9.0 (I wanted more depth of field to ensure the problem isn't a wider aperture softening the picture), 1/1250".

I experimented with and without the circular polarizer and a 112mm UV filter I had on the front, as well as with ttl and "live view". The CP filter made the shot darker, but had no other effect (in particular, rotating it appears to do nothing at all), and the presence or absence of the UV filter had no effect that I could perceive.

The tripod/head combination is rated for 38lbs. of video equipment, and appears to be stable. In the picture I took of the bird at the beach, the wind was definitely a factor. Today, here, it was mostly calm with gusts up to about five mph. In both cases I was using a wired remote shutter control with a three second (mirror up) delay.

Autofocus used in each case (by the way, there is a difference between TTL and LV, but it's in the exposure not the focus - LV makes it lighter by about half a stop - probably some setting I got wrong in the menu system).

The neighbor's siding is about 76 yards away, and the little flowers about 10 or 12 (settings changed from above, see exif).

These are also unprocessed, developed from DNG (silkypix) and uncropped. I do normally underexpose my shots by one or two stops, figuring I'm making sure I'm getting all the data I can, and that I can lighten things up in software later. I didn't do that on any of these in order to preserve the originals as closely as possible for analysis.

No question, the faster shutter speed makes an enormous difference.

Haven't experimented with the APS-C camera yet.
Forum: Lens Clubs 03-09-2019, 04:44 PM  
300mm plus Lens Club: discuss your long lenses
Posted By dlh
Replies: 30,829
Views: 2,808,327
Still looks fuzzy to me. Did a good bit of experimenting with it, and no part of the picture is really in focus by my lights. Earlier, I'd said I thought it must be focussing ahead of the point I intended to focus on, but I've changed my mind. Took about a hundred and fifty pictures with it this morning, at all different (terrestrial) distance ranges, but I'm convinced I'm getting much clearer and sharper pictures with D FA 24-70mm and D FA* 70-200mm lenses. This picture is developed from DNG as uncompressed JPEG, and cropped. No "enhancements" otherwise, either in the camera or postprocessing. Just doesn't seem right, particularly contrasted with pictures posted by zzeitg (among others). What do y'all think?
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