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Forum: Pentax SLR Lens Discussion 1 Day Ago  
But Pentax is a business for the ones who would...
Posted By THoog
Replies: 61
Views: 2,081
Since it directly relates to this thread, I think it's worthwhile to throw in another Hoya sin: reducing the lens design staff and "retiring" Jun Hirakawa. Based on how few "original" lenses were released between 2010 and 2013, I would say the lens team was gutted. Ricoh/Pentax has had to do more than just make new lenses, they have had to rebuild a team and a culture to create worthwhile new lenses.
Forum: Pentax SLR Lens Discussion 2 Days Ago  
Poll: Vintage 135mm M42 lenses - Isco, Sonnar, Jupiter... Quick comparison. Poll.
Posted By THoog
Replies: 6
Views: 323
Just to be contrarian, I vote for the Pentacon 135/2.8, the "Bokeh Monster". :D
Forum: Pentax SLR Lens Discussion 4 Days Ago  
Superzoom for KP with "starburst effect" ?
Posted By THoog
Replies: 5
Views: 351
I don't think you are going to find what you want. Newer lenses are usually designed for strong flare resistance, which prevents good starbursts. Looking at the flickr pool for the Sigma 18-300, there are very few examples of "good" stars, and those images that have stars obviously used f/22 and a tripod. If you can take a tripod, you might as well take your DA 15 Ltd.

The Pentax 18-250 and 18-270 are rebadged versions of the Tamron 18-250 and 18-270.
Forum: Pentax SLR Lens Discussion 5 Days Ago  
Adapting Altix lenses to Pentax K using an M42 adapter
Posted By THoog
Replies: 5
Views: 376
I don't have any direct experience, but from what I've read on other forums, it appears that the Altix lens locking mechanism is actually in front of the flange. Putting an M42 adapter ring hard against the lens body is effectively recessing the lens a few millimeters into the camera body, which may be enough to get infinity focus. On some Altix-mount lenses, there is a risk of the mirror hitting the rear of the lens.
Forum: Travel, Events, and Groups 5 Days Ago  
Chicago Museum of Science & Industry
Posted By THoog
Replies: 5
Views: 240
It's in a rather narrow hallway, right next to the parking deck entrance. One side has a raised ramp for pretty much the entire train length; the other side is track-level. You are going to want wide lenses, especially for the interior. Exterior lighting isn't great, but it can be adequate for glamour shots of the front and rear if you push up the ISO and have steady hands - I got this with a DA 15 wide open on my K-01, 1/15 sec, ISO 3200. It was closing time and they were starting to turn off lights and chase people out, so I didn't have time to really work on the setup.


Pioneer Zephyr by T. Hoog, on Flickr
Forum: Pentax SLR Lens Discussion 04-04-2018, 02:06 PM  
Mysterious lens - what is this? (IR chrystal night vision 0.42x)
Posted By THoog
Replies: 10
Views: 560
It appears the red (or "Ruby") coating is something that was introduced on binoculars some years back to make spotting wildlife easier in green foliage. It became popular on cheap optics because it looked "cool", but it doesn't do much of anything for infrared.

Also, a wide-angle conversion lens isn't the same thing as a focal reducer. A focal reducer / telecompressor goes between the lens and sensor and concentrates the image circle into a smaller area. A conversion lens (aka secondary lens) is just adding an afocal element on the front of the lens to make the FoV wider. A focal reducer can make the primary lens "faster", while a conversion lens usually loses at least one stop of light.
Forum: Pentax K-01 03-27-2018, 04:41 AM  
Happy Birthday to the K-01!
Posted By THoog
Replies: 107
Views: 13,917
Five: Basic Black, Black/Yellow "Bumblebee", White/Black "Panda" (not sold in Europe), Silver/Black (only sold in Europe), and While/Blue "Smurf" (2013 limited issue in Japan only).

And you clearly haven't read through the entire thread: :lol::D:lol:

Forum: Pentax SLR Lens Discussion 03-14-2018, 10:37 AM  
Effects of 2x converter
Posted By THoog
Replies: 21
Views: 737
Maybe everyone goes through the "ooh, a cheap teleconverter would give me twice the reach!" phase. I had pretty much given up on teleconverters until I tried the DA 1.4x on a DA*300. A good TC on a great lens gives at least good results, but an average TC on an average lens gives... much less than average results.
Forum: Pentax SLR Lens Discussion 03-13-2018, 03:02 PM  
Effects of 2x converter
Posted By THoog
Replies: 21
Views: 737
Compared to the DA 1.4x and the F 1.7x, the 2x converters I have tried were roughly equivalent to smearing vaseline on the front of the lens and cropping 50% in post, only worse.
Forum: Pentax News and Rumors 03-13-2018, 11:14 AM  
More Limited lenses
Posted By THoog
Replies: 210
Views: 14,193
"Nice optical factory you've got here - very clean, very modern. We sure would hate to see something bad happen to it..."

Maybe Olympus can help - weren't they rumored to have friends in "the business"? :lol:
Forum: Pentax Camera and Field Accessories 03-13-2018, 09:10 AM  
Focusing Screens, Again
Posted By THoog
Replies: 7
Views: 557
I haven't used the Ec-L or the S-type specifically, but I have used a number of K3 screens and other screens with a split-prism in the center, like the Ec-L, and I have followed the various threads over the years. Basically, putting anything between the lens and meter other than the screen that the meter was designed for, is going to have some effect on metering.

The Ec-L will have metering issues similar to the K3 or F6 screens. This is because the split prism in the center will partially "black out" in some lighting conditions, and the meter will have a big black blob in the middle of the screen, throwing off the reading in unpredictable ways. The impact may vary depending on the size of the split-prism, the lens, lighting conditions, and the metering mode, but it will happen - it's just the nature of split-prism screens. Split-prisms affect spot metering in particular, as it is looking right at the center of the screen where the blackout will occur..

The S-type screens have a "microlens" surface across the entire screen, which may also affect metering in some conditions, but the effect tends to be more consistent than a screen with a split-prism. If I recall correctly, they tend to darken the overall view slightly. In this case, spot metering doesn't really make a difference.
Forum: Photographic Industry and Professionals 03-09-2018, 11:24 AM  
Pentax Museum closed - what happened to the exhibits?
Posted By THoog
Replies: 3
Views: 661
Forum: Homepage & Official Pentax News 03-08-2018, 09:21 AM  
CP+ 2018 Pentax Interview
Posted By THoog
Replies: 30
Views: 1,159
Not necessarily the same people, but "resources" could also be the checkbook that pays outside vendors to design & fabricate tooling (and from what I've read, injection molds aren't cheap!), or fabricate electronics or mechanical parts - anything they outsource. If they have thrown everything at FF lenses, I can see it taking funds from camera bodies, even if uses different internal staff resources. Of course, they wouldn't want to stop camera production, but they might reduce budgets for completely new products.

If they could just produce a new body that looks identical to the last one and uses the exact same moldings - oh, wait. :D
Forum: Pentax Camera and Field Accessories 03-07-2018, 04:02 PM  
Mobile D-LI90 and D-LI109 charger
Posted By THoog
Replies: 11
Views: 577
I recently looked at those, but ended up buying a smaller 1-cell "slim" USB charger because I wanted to team it with a compact USB battery pack (an Anker PowerCore 10000) so that I could charge a camera battery on the fly in my backpack. I intend to write a review when I have had more time with it, but so far, I can say:

1) It's a generic Chinese charger and was designed for more than one battery type, and did not have a notch for the alignment pin (I guess that's what it is) on the D-Li109. I cut my own notch (the charger cost less than ten bucks, so why not?). I'm also going to make an elastic loop to hold the battery in place while charging.
2) It's not a rapid charger, which I am okay with, as the batteries have not gotten noticeably warm while charging.
3) It took about three hours to charge a '109 that had been sitting around for several months and showed as fully depleted.

amazon.com : D-Li109 Ultra Slim USB Charger for Pentax K-1S, K-30, K-50, K-500, K-r Camera Battery : Camera & Photo?tag=pentaxforums-20&
Forum: Pentax SLR Lens Discussion 03-06-2018, 05:11 PM  
Which normal lens to get: Sigma 30, Sigma 35 (old, new), Pentax 35?
Posted By THoog
Replies: 11
Views: 556
Optically, the Sigma Art 35 is probably the best of the three (Art 35 / Art 30 / EX 30), but you pay for it in weight and dollars - 50% more weight, and nearly twice the price. The lightest one would still be the EX 30. The Art 30 is slightly heavier. I've used both the EX 30 and the Art 30; I consider the Art 30 to be a slightly better general-purpose lens, thanks to its flare resistance and slightly flatter plane of focus. The Art 30's bokeh has slightly more "blur" at each f-stop. The EX 30 does nice "stars" from streetlights - the Art 30 firmly refuses to "star" at all (again, thanks to the flare resistance). Some bodies have AF issues with the Art 30, which has been discussed at length elsewhere.
Forum: Pentax Camera and Field Accessories 03-06-2018, 01:13 PM  
cheap D-LI90 accu for K1
Posted By THoog
Replies: 20
Views: 773
I don't think you've tried any D-Li90s in your K-30, since it uses the D-Li109. :) The '109 is considerably lower in capacity than the D-Li90, with only 1050 mAh, compared to 1860 mAh.

To the OP, it's worth pointing out that the Amp Hour ratings on 3rd-party batteries vary widely. I've seen 3rd-party D-Li90s from 1400 mAh to 2900 mAh - more than a 100% difference! Even though that is the capacity they claim, not necessarily what they deliver, it's worth the time to look closely at the battery specs, and not just the price tag.
Forum: Maintenance and Repair Articles 02-27-2018, 04:17 PM  
Industar-50 - how to access the diaphragm for cleaning and repair
Posted By THoog
Replies: 6
Views: 537
Thanks for posting! The Industar-50 is such a fun little lens, assembled with the finest Russian sledgehammers! :D
Forum: Pentax News and Rumors 02-27-2018, 01:20 PM  
Good: New roadmap, new lens
Posted By THoog
Replies: 407
Views: 23,368
f/4 isn't fast enough for places where the sun doesn't shine. :D

I agree on the need for Pro lenses, and yet... I will never buy the *85/1.4, but would be interested in the 70-200/4.


This is pure speculation, but I doubt it was an either-or decision between the 70-200/4 and the *85/1.4 - more like the *85 needed time or resources that only became available once the *50 was done. Maybe the "Surprise! It's a consumer zoom!" team got the 70-200 project. (The tell-tale will be if it it's collapsible. :) )
Forum: Pentax News and Rumors 02-27-2018, 05:57 AM  
Good: New roadmap, new lens
Posted By THoog
Replies: 407
Views: 23,368
What about focus speed? As much as I love my 60-250, it's relatively slow to focus. I even suspect that it may be more of a contributor to the "Pentax AF sux" mindset than the number of focus points. And then there's the focus breathing. I don't think either of these issues have easy fixes. A 70-200/4 with PLM-like focus speed could be an attractive option.
Forum: Pentax News and Rumors 02-22-2018, 07:22 PM  
CP+ 2018 Interview Question Suggestions
Posted By THoog
Replies: 146
Views: 7,678
I would like to see more "what do you think?" kind of questions, rather than the usual product/feature interrogation questions. For instance:
- What do they see as the biggest challenges in the current market?
- Do they see the product cycle slowing down?
- If cell phones are killing off entry-level cameras, how do they see new photographers getting started with DSLRs? Used equipment?
Forum: Pentax K-01 02-14-2018, 06:51 AM  
Live view on K-01 ? use for microphotography
Posted By THoog
Replies: 6
Views: 577
I'm pretty sure the K-01's HDMI-out is playback mode only, and LiveView only works over the regular A/V-out. It's been a common complaint over the years. If you search the K-01 forum, you should find several threads about it.
Forum: Pentax K-01 02-02-2018, 07:30 AM  
Happy Birthday to the K-01!
Posted By THoog
Replies: 107
Views: 13,917
I ran out of colors at five, but the K-01 is officially six years old today!

Forum: Non-Pentax Cameras: Canon, Nikon, etc. 01-18-2018, 09:13 PM  
35mm f2.4 for Leica
Posted By THoog
Replies: 4
Views: 373
Well, the first thing you should have thought of :) is the Carl Zeiss Jena Flektogon 35/2.4, which has been around since at least the 1970s (I'm not entirely sure when CZJ switched from 35/2.8 to 35/2.4). In optical design, the IBERIT is closer to the Flek - 6 elements in 6 groups - than either the Pentax (6 in 5) or Leica (6 in 4). If, as they claim, their optics are designed in Germany, I'd think they would look for inspiration at home, rather than Japan.

Handevision's IBERIT lenses are all f/2.4, which mimics Leica's Summarit-M lenses, also all f/2.4 (IBERIT: 24/35/50/75/90mm, Summarit-M: 35/50/75/90mm).
Forum: Pentax DSLR Discussion 01-04-2018, 08:28 AM  
Thinking of a new camera body.
Posted By THoog
Replies: 31
Views: 1,307
I included the K-50 in my list of bodies that could use AAs with the adapter clip: "K-r/30/50/500".
Forum: Pentax DSLR Discussion 01-04-2018, 07:27 AM  
Thinking of a new camera body.
Posted By THoog
Replies: 31
Views: 1,307
Coming into the conversation late, and the point is moot if you don't like AAs, but since the Internet is forever and others may be reading: the K-S1 doesn't use AA batteries. It uses the same D-Li109 battery as the K-S2. The K-x was the last Pentax body to only use AAs; the K-r/30/50/500 used the D-Li109 or AAs with an adapter clip, and higher-end bodies with a grip.

My K-S1 comes closer to my K-x in small size and handiness than anything else I've tried, but the odd grip and looks put off a lot of people. The K-S2 is a better value, having more features in a package almost as small as the K-x, but a little heavier (if size is a concern).

I will say that the 20MP sensor in the K-S1/S2 comes closer to the "look" of the 12MP in my K-x than the 16MP or 24MP sensors. In my opinion, in low light, the 16MP sensor in the K-5 (and others) has the edge over the earlier 24MP (K-3,K-3II) or the 20MP, but the newest versions of the 24MP in the K-70 and KP are hard to beat.
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