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Forum: Pentax News and Rumors 5 Days Ago  
[New Product Story Vol.8] Aperture coupler is (sorta) back!
Posted By Breakfastographer
Replies: 208
Views: 11,517
Just to clarify, I wasn't being cynical. I vaguely remembered that something like this existed. I think what I saw earlier was a more basic, command line thing compared to fs999's GUI effort.
Forum: Digital Processing, Software, and Printing 5 Days Ago  
Anyone try Luminar AI yet?
Posted By Breakfastographer
Replies: 11
Views: 785
I'm sure if you look around a little, you'll find resources that are helpful to you.
Forum: Pentax News and Rumors 01-06-2021, 01:27 AM  
[New Product Story Vol.8] Aperture coupler is (sorta) back!
Posted By Breakfastographer
Replies: 208
Views: 11,517
Thank you for posting that information (probably for the nth time, so extra thanks for that ;)).
Forum: Pentax DSLR and Camera Articles 12-28-2020, 09:13 AM  
Sticky: A LITTLE BIT OF HISTORY: Development of the solenoid in Pentax cameras
Posted By Breakfastographer
Replies: 46
Views: 8,574
But do you have evidence that the "Japan" solenoid is still in production?

---------- Post added 12-28-20 at 09:26 AM ----------


I keep hearing that it was slightly improved for the K-70, yet still fails, just not as quickly. The argument that Teflon should be used seems quite convincing, but I don't see evidence that Shinmei is willing to change materials or open a new production line for a Teflon solenoid - or that Ricoh is willing to shell out to make this happen for Shinmei, or take production into their own hands (patents?).

---------- Post added 12-28-20 at 10:06 AM ----------


Between the K-70 and KP, I'm struggling to find evidence of this. The KP weighs 703g with battery and card, the K-70 688g, a difference of 15 grams, or 2.1%. The KP may have a lighter flash unit (GN 6 rather than GN 12). Battery life almost exactly the same. The extra size of the KP is mostly in the prism housing, which has nothing to do with solenoid vs. stepping motor.

Do we know the unit cost of a solenoid vs. a motor?
Forum: Welcomes and Introductions 12-28-2020, 07:30 AM  
Pentax blogger
Posted By Breakfastographer
Replies: 28
Views: 1,886
Thank you, @Field Films. Have a happy 2021 when it comes!
Forum: General Photography 12-27-2020, 11:13 PM  
Vivitar 28 2.5 vs 2.8
Posted By Breakfastographer
Replies: 10
Views: 458
There is a version of the Miranda that is externally near-identical. Same focus throw, same filter size, same grippy nibs (four rows), same aperture ring, very similar markings - as close as I can tell without holding them both in my hands, obviously! That doesn't answer the question, as Miranda did not make lenses, but maybe it gets us one step closer to the real answer.
Forum: Pentax News and Rumors 12-27-2020, 10:11 PM  
[New Product Story Vol.8] Aperture coupler is (sorta) back!
Posted By Breakfastographer
Replies: 208
Views: 11,517
Just letting you guys know that an interesting discussion has developed on the other forum about how the features discussed in this product story might be further enhanced.
Forum: Pentax DSLR and Camera Articles 12-27-2020, 09:58 PM  
Sticky: A LITTLE BIT OF HISTORY: Development of the solenoid in Pentax cameras
Posted By Breakfastographer
Replies: 46
Views: 8,574
If I understand what photogem is saying correctly (and what you are saying), then when the company transferred production from Japan to China, it also abandoned the "Japan solenoid" Teflon design in favour of the presumably cheaper alternative, PET. If the Teflon variant is out of production, I wonder if Ricoh would be willing to purchase a sufficient volume to make it worth setting up the needed assembly line at the new plant.

Alternatively, wouldn't a better plan from Ricoh's perspective be to transfer all body tiers to the stepping motor?
Forum: Pentax News and Rumors 12-27-2020, 06:30 PM  
[New Product Story Vol.8] Aperture coupler is (sorta) back!
Posted By Breakfastographer
Replies: 208
Views: 11,517
My understanding is that the magic of aperture coupling, in those cameras were it was fully working, was that the camera could meter correctly without needing to stop down based on knowing what aperture it was at and what it would be stopped down to. This magical way of working is why people want it back.

Compared to your m42 example, the advantage is that you wouldn't have to look through a stopped down lens in the VF - or to focus first with aperture open, then stop down to meter, which, yes, you can do manually on m42, but it's still an extra step and violates the "don't make me think" principle.

---------- Post added 12-27-20 at 06:43 PM ----------





Hmm... I'm not sure exactly what to think. One of the reports for the 8-16mm Sigma complains of the problem, states using the K-3 but does not state that the problem is absent on the K-3:
Sigma 8-16mm F4.5-5.6 DC HSM Lens Reviews - Sigma Lenses - Pentax Lens Review Database

He does say he also uses the K-5, but if you're listing it as not working, it would seem to make sense to also state if one of your cameras is an exception.

The other four reviews that complain of the problem do not list the camera used.
Forum: General Photography 12-27-2020, 06:15 PM  
Vivitar 28 2.5 vs 2.8
Posted By Breakfastographer
Replies: 10
Views: 458
Interesting challenge. I feel like I've seen that exact lens before, and if I did, it was definitely not under that brand name. Can't quite place my mind's finger on it, though.
Forum: Pentax News and Rumors 12-27-2020, 05:56 PM  
[New Product Story Vol.8] Aperture coupler is (sorta) back!
Posted By Breakfastographer
Replies: 208
Views: 11,517
Withdrawn in light of further discussion.
Forum: Photographic Industry and Professionals 12-27-2020, 04:48 PM  
Instagram's new Terms of Service - Dec 20/2020
Posted By Breakfastographer
Replies: 23
Views: 9,290
I don't know what it means, but that link is now already dead.
Forum: Pentax News and Rumors 12-27-2020, 04:36 PM  
[New Product Story Vol.8] Aperture coupler is (sorta) back!
Posted By Breakfastographer
Replies: 208
Views: 11,517
Thank you, Serkevan, glad to know they fixed that. I have reasonable hope, then, that they may have carried that change forward to the KP and K-3 III. I mean, it would make sense to fix it once and for all.
Forum: Pentax News and Rumors 12-27-2020, 03:31 PM  
[New Product Story Vol.8] Aperture coupler is (sorta) back!
Posted By Breakfastographer
Replies: 208
Views: 11,517
Sorry, as of which camera?

For the longest time, IBIS wouldn't work correctly with <10mm FL (and could not manually be set for it!), and the EXIF field for focal length would just be left blank or set to 10mm if FL was <10mm. This would then also trip up third party lens corrections, among other things (correcting 8mm images for 10mm distortions, say - which in UWA really isn't ideal). I remember seeing scripts for bulk correction of EXIF values to fix some of these problems.
Forum: Pentax News and Rumors 12-27-2020, 04:31 AM  
[New Product Story Vol.8] Aperture coupler is (sorta) back!
Posted By Breakfastographer
Replies: 208
Views: 11,517
Seems like there's still no word on whether focal lengths shorter than 10mm are now fully compatible.
Forum: Pentax Forums Giveaways 12-26-2020, 05:33 PM  
Pentax KP Giveaway - Enter here once per day until December 26th!
Posted By Breakfastographer
Replies: 1,644
Views: 27,255
I guess nobody but the boss knows.
Forum: Welcomes and Introductions 12-26-2020, 05:32 PM  
New member
Posted By Breakfastographer
Replies: 16
Views: 539
Welcome to the forum, Byron. Nice flower shot, too!
Forum: Welcomes and Introductions 12-26-2020, 05:28 PM  
Hi from the lovely Eastern Shore of Maryland
Posted By Breakfastographer
Replies: 27
Views: 633
Hi Karl, some answers:
  1. Either one could be limiting. If you continue to use the K20D, you can use cheaper glass and get nice results. If you upgrade to a K-3 III and pixel-peep, you'll want expensive glass to go with it. Expensive and heavy. But very sharp and croppable.

  2. Just do it.

  3. Paying attention to the metering indicator.

Welcome to the forum!
Forum: Welcomes and Introductions 12-26-2020, 05:23 PM  
Newbie
Posted By Breakfastographer
Replies: 9
Views: 291
Heretic! ;) Welcome to the forum!
Forum: Welcomes and Introductions 12-26-2020, 05:23 PM  
Hi, another new member
Posted By Breakfastographer
Replies: 15
Views: 422
It's a good choice. Welcome!
Forum: Welcomes and Introductions 12-26-2020, 05:22 PM  
Newish Member
Posted By Breakfastographer
Replies: 17
Views: 547
Welcome, forum intruder!
Forum: Pentax K-1 12-26-2020, 04:28 PM  
rawshooters, do you use sRGB or AdobeRGB?
Posted By Breakfastographer
Replies: 21
Views: 1,062
The question is an absolutely legitimate one if, as a "raw shooter", one uses the JPEG as backup in the unlikely case that the raw file becomes corrupted. AdobeRGB will, generally speaking, give you more raw-like editing abilities, although admittedly by a hair.

---------- Post added 12-26-20 at 04:32 PM ----------


Right, the better printing labs have profiles to download. I also suspect that many that use desktop or browser-based submission convert image files to whatever their machines need without the end user realising.
Forum: Pentax DSLR Discussion 12-26-2020, 02:43 PM  
Which camera for Astrotracer function?
Posted By Breakfastographer
Replies: 13
Views: 657
It's a separate microprocessing unit ("chip") on the camera's motherboard that reduces noise, improves dynamic range, and adjusts saturation in high sensitivity images (high ISO). For the Pentax KP, it was a large part of the reason the camera competed very favourably against full frame models from other manufacturers, and it may in large part be the basis of Pentax' claim that the new camera (K-3 III) will be similarly competitive in image quality, maybe even more so.
Forum: Troubleshooting and Beginner Help 12-26-2020, 05:16 AM  
Helios 44-2 Mounting off with Spotmatic F?
Posted By Breakfastographer
Replies: 15
Views: 747
Are you asking for sample images?
Forum: General Photography 12-26-2020, 04:56 AM  
Ettl vs ettr
Posted By Breakfastographer
Replies: 51
Views: 1,282
Not sure what you mean by shoulder - the raws are clipped at whatever is the maximum value for the bit depth, e.g. a value of 16384 for each channel in 14 bits, or 4096 for 12 bits. It is my understanding based on observation that some raw converters recover more highlight detail than is actually in the recorded image, which is really trivially easy to do if you don't take it too far (i.e., it's wrong, but it "works").
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