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Forum: General Photography 1 Hour Ago  
Huawei again accused of passing off DSLR photos as smartphone shots
Posted By stevebrot
Replies: 7
Views: 249
I like that it was posted on an Apple fan site ;)


Steve
Forum: Pentax SLR Lens Discussion 6 Hours Ago  
Sigma Support - Good for a Laugh
Posted By stevebrot
Replies: 48
Views: 1,073
Yes, you obviously knew more about the lens than they did. :)


Steve
Forum: Photographic Technique 6 Hours Ago  
Action Autofocus - Just Not Getting It
Posted By stevebrot
Replies: 13
Views: 494
Either that or focus was not attained when the shutter was released (i.e. no green hexagon).


Steve
Forum: Pentax K-3 6 Hours Ago  
Wait...Sensor Shifting in Live Mode is Normal?
Posted By stevebrot
Replies: 7
Views: 353
Do it again with the lens cap on and see if the "click" goes away.


Steve
Forum: Troubleshooting and Beginner Help 10 Hours Ago  
K-3 scratchy sound (similar to start-up) in live view
Posted By stevebrot
Replies: 10
Views: 338
Ha! Ha! I don't know that I can keep it straight most of the time. In my opinion, the automated stopping down in live view is a bit of a pain. I would prefer full-time at the set aperture or open-aperture over the current feature. The main reason being that I use live view to confirm AF fine adjustment and prefer to not have extra DOF thrown in when I am not expecting it.


Steve
Forum: Pentax SLR Lens Discussion 11 Hours Ago  
Sigma Support - Good for a Laugh
Posted By stevebrot
Replies: 48
Views: 1,073
?????

Your lens has no electrical contacts through which to do a firmware update. This is obvious to you because you have the lens in hand. It would not be obvious to the poor customer service representative who does not have this lens in their list of supported or recent product. You got a canned, though accurate response. No, they cannot help you. Ricoh/Pentax would have given a similar response.


Steve
Forum: Pentax K-3 11 Hours Ago  
Wait...Sensor Shifting in Live Mode is Normal?
Posted By stevebrot
Replies: 7
Views: 353
As noted in the link you shared, a certain amount of sound from the camera is normal, though my experience with the K-3 is that such is both rare and minimal. Is there a particular reason why you feel that your camera's sounds are indication of a problem or that the sound is coming from the SR system? It may not be related to your concern, but there is a normal sound associated with live view that comes from the aperture mechanism. It makes a faint scratchy buzz when the lens is pointed towards or away from a bright light source. The same noise happens on camera startup. Might that be what is concerning you?


Steve
Forum: Lens Clubs 12 Hours Ago  
55mm Lens Club - Pentax, Vivitar, Cosina, Porst - bring 'em all!
Posted By stevebrot
Replies: 35
Views: 597
Here are a few more taken with the Sightseeing Screwmount, Pentax SV. Although the project is now dormant, the traveling SV was instrumental in introducing many Pentax Forum users to film photography and/or old-school non-TTL metering. Forum users would sign up in advance for a couple of weeks with the camera with the only cost being that of shipping to the next person on the list with the owner (user @woof) being at the end. The camera was initially packaged with a Super Takumar 55/1.8 and a compact selenium light meter, but soon acquired a Super Takumar 28/3.5 (v2) courtesy of one of the chain members. With time, the camera also acquired a durable wooden shipping box, at least one repair/CLA, and various accessories. Most users managed to move at least two rolls of film through the camera and the results were shared here on PF and on Flickr with often impressive results. I took two turns with the Sightseer and believe it completed at least three tours before the chain failed.
Sightseeing Screwmount - PentaxForums.com

Sightseeing Screwmount(s) | Flickr

Old Columbia River Highway (U.S. 30) | Super Takumar 55/1.8


Pentax SV, Super Takumar 55/1.8, Kodak Ektar 100

These curves are just below the Rowena Crest viewpoint near the east end of the Columbia River Gorge and make for a fun decent from the high bluff to river level.


Cathlapotle Plankhouse, Entrance | Super Takumar 55/1.8


Pentax SV, Super Takumar 55/1.8, Rollei Retro 100

The plankhouse is a reconstruction of the type of structure observed by the Lewis and Clark expedition near what is now Ridgefiled, Washington, USA. In fall of 1805, when the expedition passed, the area was the site of an extensive Chinookan (native American) village with multiple such structures. The plankhouse is constructed of cedar log posts and beams with a cedar plank roof lashed in place. The door in the photo is about 4 foot high and requires the person entering to duck down while doing so.

Cathlapotle Plankhouse - Friends of the Ridgefield National Wildlife Refuge


Steve
Forum: Pentax Film SLR Discussion 13 Hours Ago  
Gear P0rn - post it if you got it.
Posted By stevebrot
Replies: 5,636
Views: 651,304
How do you like the eye-directed AF?


Steve
Forum: Pentax DSLR Discussion 21 Hours Ago  
Light transmission curves for the K5 to K1 cameras. Anyone know where to get them?
Posted By stevebrot
Replies: 4
Views: 388
All but the K-5 and K-5II don't have low-pass filters.


Steve
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 22 Hours Ago  
Help with lens mount ID?
Posted By stevebrot
Replies: 15
Views: 230
Nikon's retention notch is opposite the actuator. That is missing on this lens.



That big fat pin is the strange thing overall. The lens also has an "A" position which would be inconsistent with my guess of the Rolleiflex SL 35E. I am stumped.

Note: Posted and noticed that the riddle had been solved. I did not go down the Fuji path. :o


Steve
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 23 Hours Ago  
Help with lens mount ID?
Posted By stevebrot
Replies: 15
Views: 230
I would hazard that it is to fit a 35mm Rolleiflex (SL 35 E), but not 100% sure.


Steve
Forum: Lens Clubs 1 Day Ago  
55mm Lens Club - Pentax, Vivitar, Cosina, Porst - bring 'em all!
Posted By stevebrot
Replies: 35
Views: 597
Embossed cowhide from Aki-Asahi.

Aki-Asahi Camera Coverings


Steve

(...no relation to Aki-Asahi except as a happy customer...)
Forum: Photographic Technique 1 Day Ago  
Action Autofocus - Just Not Getting It
Posted By stevebrot
Replies: 13
Views: 494
Here are the basic rules. Some are the same as with manual focus and some are not. A few are intentionally tongue-in-cheek, but are still important.:
  • There is no magic mode. What's more, what magic there is will readily disperse whenever the camera is pointed towards active children and/or dogs

  • If you allow the camera to choose the point of focus, chances are pretty good that the camera's choice will be different than yours. While letting the camera choose often works quite well, don't expect the results to be perfect. The camera will choose the first point where it deems focus is attainable within the set zone.

  • If you tell the camera the intended point of focus (spot or select), the camera will make its best effort to acquire focus at that point, but focus is not acquired until it signals such (green hexagon and beep). The red dot only indicates the active focus point.

  • Accurate fine focus requires that the intended point of focus be unambiguous and have detail. A curved surface is ambiguous as is a region of low contrast.

  • Once acquired, whether the camera attempts to retain focus depends on mode. This never happens in AF-S mode. AF-C mode is used for continuous focus.

  • AF-A is only useful if you don't care to know that is happening

  • AF-S and AF-C are equally fast

  • Unless set to "focus priority", the shutter will release regardless of whether focus has been attained. This is true for both AF-S and AF-C.

  • There is only one plane of focus and like all planes, it is infinitely thin. As a result, viewing at full resolution (pixel peeping) will often as not indicate that the plane of focus is not within your image.

  • Do not expect the camera to create depth of field when the lens says there is none. The range of acceptable focus may be quite reasonable at f/5.6 for a particular lens and subject distance, but be completely unworkable at f/2.

  • Focus attained at a particular point in time is not likely to be accurate for more that a few milliseconds when shooting children or dogs in motion

  • Camera motion is often mistaken for missed focus

  • Manual focus film SLRs usually have some form of focus aide such as a split-image rangefinder or microprism grid. Both are very good at consistently detecting an out of focus subject. Modern PDAF systems are not quite as consistent at that task. The CDAF system (live view) is quite a bit better, but relatively slow.

  • The AF point is both larger and smaller diameter than one might think. (Ponder that for awhile.)

  • The AF speed of a particular lens/camera is never adequate unless it is another brand in the hands of someone else

  • Regardless of claims made by enthusiastic users, "nailing" focus seldom happens hand-held or with a moving subject

  • While the camera's AF is potentially much faster, if the subject would be difficult to focus on using manual technique (even if stationary), chances are the camera will have a hard time with it as well

My K-3 has essentially the same AF behavior as your K-3II and I am quite pleased with its AF system. It is quite a bit better than that in the K10D that I had before. I do a lot of manual focus work but also use AF where critical focus control is not strongly desired. Usually, I use AF-S (focus priority), spot (center point) with classic focus-recompose technique. If photographing a cluster of kids, I might move to AF-C (shutter priority), 9-point zone select. A short burst of shutter might also be in order as also might f/5.6 or f/8. I usually don't photograph clusters of kids, so that last statement may work great or may not. Being a traditionalist with decades of manual focus experience, I may fall back to manual focus technique even for moving subjects. It works very well for bicycle and motor racing. I don't photograph dogs running around the yard. ;)

P.S. On your example photo, focus is on the boy's right shoulder. If you were shooting AF-S (focus priority) spot, there is a chance that the camera is "front-focused" with this lens. Determining if this is the case and applying fine tuning might be worth doing, but is something I generally don't recommend unless one is sure that the fine adjustment is appropriate.


Steve

(...stopped just short of suggesting a D500, but even that camera may not be up to the active kid challenge...)
Forum: Pentax Film SLR Discussion 1 Day Ago  
Post your B&W Film shots
Posted By stevebrot
Replies: 7,512
Views: 761,152
Nice photo! I did not like your description of the RR 80s problems though. I have a cache of 120 in the freezer and am now wondering if it is going to be problematic. I guess there is nothing to do but shoot it and hope for the best.


Steve
Forum: Troubleshooting and Beginner Help 1 Day Ago  
Upgraded K-1 Mark II Now has Banding on LCD
Posted By stevebrot
Replies: 9
Views: 512
Have you contacted the shop that did the conversion?


Steve
Forum: Pentax News and Rumors 1 Day Ago  
More Pentax SSL Problems
Posted By stevebrot
Replies: 13
Views: 1,294
Tell that to the BBC... ;)

BBC - Homepage


Content-heavy sites still segregate secure from non-secure services.


Steve
Forum: Lens Clubs 1 Day Ago  
55mm Lens Club - Pentax, Vivitar, Cosina, Porst - bring 'em all!
Posted By stevebrot
Replies: 35
Views: 597
And a few film images taken with the Sightseeing Screwmount Pentax SV

Mt. Hood From Trillium Lake | Super Takumar 55/1.8


Pentax SV, Super Takumar 55/1.8, Rollei Retro 100 scanned with Nikon 5000 ED


Roof, Timberline Lodge | Super Takumar 55/1.8


Pentax SV, Super Takumar 55/1.8, Rollei Retro 100 scanned with Nikon 5000 ED


Steve
Forum: Lens Clubs 1 Day Ago  
55mm Lens Club - Pentax, Vivitar, Cosina, Porst - bring 'em all!
Posted By stevebrot
Replies: 35
Views: 597
Purple Penstemon | Auto Rikenon 55/1.4 (M42, Tomioka)


Pentax K-3, Auto Rikenon 55/1.4

Sometimes the blue hour works for flowers and happily, this time it did :D


Steve
Forum: Lens Clubs 1 Day Ago  
55mm Lens Club - Pentax, Vivitar, Cosina, Porst - bring 'em all!
Posted By stevebrot
Replies: 35
Views: 597
Overwrought Clouds | Auto Rikenon 55/1.4 (M42, Tomioka)


Pentax K-3, Auto Rikenon 55/1.4


New Cloths for the Rough Spottie | Auto Rikenon 55/1.4 (M42, Tomioka)


Pentax K-3, Auto Rikenon 55/1.4

Yes, two 55mm, one for the taking and one for the subject. ;)



Steve
Forum: Lens Clubs 1 Day Ago  
55mm Lens Club - Pentax, Vivitar, Cosina, Porst - bring 'em all!
Posted By stevebrot
Replies: 35
Views: 597
OK, I will play. :)

Foxglove in Fuschia | Auto Rikenon 55/1.4 (M42, Tomioka)


Pentax K-3, Auto Rikenon 55/1.4


Steve
Forum: Pentax Film SLR Discussion 2 Days Ago  
Super-Tak 55mm f/1.8 red arrow not aligned on center?
Posted By stevebrot
Replies: 4
Views: 291
This should generally not be a problem. Registration is determined by body mount face.* I have several M42 bodies and a fair number of lenses and rare is the lens-body combination where the index mark lines up exactly at 12:00 (top). One of those combinations is my Pentax SV (same body as your H3v) when paired with my early ST 55/1.8. That lens was not original to that body (separated by several years) and the nice match is coincidence. That same lens passes beyond 12:00 on my SPII and a little before on my SP. My later ST 55/1.8 is just short of 12:00 on the SV and the SPII. The lack of exact alignment is also the present with my non-Pentax lenses and non-Pentax bodies and my three genuine Pentax M42/K adapters.

The only time where alignment might be an issue is if the flipper at the bottom of the mount does not properly engage the aperture actuator pin on the lens to fully stop down the lens for exposure.


Steve

* That this is true is not immediately obvious. Thread run-out extends beyond the point where the lens snugs onto the body. FWIW, similar lack of consistent alignment is not uncommon for Leica thread mount (LTM) bodies and lenses too, so it is not just a Pentax or M42 thing. As with M42, LTM registration is determined by the body flange.
Forum: Pentax DSLR Discussion 3 Days Ago  
Sticky: About those WR body weather seals...User responsibility and best practice
Posted By stevebrot
Replies: 47
Views: 10,418
I was thinking the same thing just a few days ago. I carry a 72mm UV filter for my Sigma 17-70/2.8-4 (C) but wince when I consider having to use it.


Steve
Forum: Pentax DSLR Discussion 3 Days Ago  
When will Pentax catch up to the other big makers?
Posted By stevebrot
Replies: 199
Views: 5,339
Just don't do it in a whiny or insistent way and all will be well :p


Steve
Forum: Pentax SLR Lens Discussion 3 Days Ago  
DFA 50* 1.4 on the mountains
Posted By stevebrot
Replies: 15
Views: 890
Thanks for your impressions.



Please explain ^ ^ ^


Steve
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