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Forum: Lens Clubs 07-25-2018, 02:38 PM  
Vivitar Lens Club - share the beauty
Posted By k0og
Replies: 821
Views: 154,891
Some impatiens (touch-me-nots), petunia, etc. The impatiens are third-generation as I keep seeds each year and plant them in the spring as a fun project. (Pentax K200D, ISO100, "sunny-16" exposure rules f5.6, f8, f11.)










-Joe-
Forum: Lens Clubs 06-12-2018, 01:41 PM  
The FA Un-Limited Club
Posted By k0og
Replies: 471
Views: 103,627
Here is a wild morning glory in the morning sun. FA 24-90 on K30 (with K50 firmware), post-processed with Topaz Adjust.

-Joe-
Forum: Lens Clubs 05-02-2018, 02:08 PM  
Takumar club
Posted By k0og
Replies: 16,516
Views: 3,046,366
Creamy, dreamy...


(Pentax K200D, ISO100, wide open @f1.4, Cross-posted from Bokeh club)

-Joe-
Forum: Pentax SLR Lens Discussion 05-02-2018, 02:03 PM  
The Bokeh Club
Posted By k0og
Replies: 15,655
Views: 1,406,551
Creamy, dreamy... Wide open @f1.4.

-Joe-
Forum: Pentax SLR Lens Discussion 05-02-2018, 05:00 AM  
So what's the deal with this Takumar 135mm/2.5 I got?
Posted By k0og
Replies: 22
Views: 1,363
Forum: Lens Clubs 04-28-2018, 04:48 PM  
Takumar club
Posted By k0og
Replies: 16,516
Views: 3,046,366
Enjoying a delightful spring afternoon in my back yard, and having fun with my old Super-Macro-Takumar 50mm f4 lens mounted on a Pentax K200D. The violets are dominating the back yard, but a spider is dominating the buttercup..
Forum: Pentax SLR Lens Discussion 04-07-2018, 09:46 AM  
Poor flash performance with A series lens on K-3 compared to DA series
Posted By k0og
Replies: 15
Views: 1,000
I don't have an AF-540FGZ of any kind, but find with the built-in flash all my A-series lenses expose properly at all useable distances (including close-up, as long as I don't have the ISO pushed too high beyond P-TTL adjustment range for closeups) with all my Pentax DSLR bodies. There may be some other factor related to AF as you mention with the AF-540FGZ series flashes, but I don't think that applies to the built-in flash since it does not have AF capabilities like the 540 does. That's been my experience with my bodies and A-series lenses.

-Joe-
Forum: Pentax SLR Lens Discussion 04-07-2018, 09:36 AM  
Poor flash performance with A series lens on K-3 compared to DA series
Posted By k0og
Replies: 15
Views: 1,000
A possible explanation as to why the close-up shots are overexposing is that at closer ranges the lens needs to stop down more due to higher light values in the P-TTL pre-flash light measurement, and if there is a sluggish aperture mechanism it may be not quite closing all the way by the time of exposure hence overexposing the shot. Yet, at greater distances the aperture would not close down much if at all, hence the aperture is responsive enough to close correctly by the time of exposure.

-Joe-
Forum: Pentax SLR Lens Discussion 04-07-2018, 07:05 AM  
Poor flash performance with A series lens on K-3 compared to DA series
Posted By k0og
Replies: 15
Views: 1,000
I have to differ on this point. I have several A-series lenses (both Pentax and non-Pentax brand) and they all expose well in all the auto-exposure modes (including with built-in flash) as long as they are on the "A" setting on the aperture ring. This is with all my Pentax DSLR bodies.

If you are not getting good automatic exposure with the aperture ring in the "A" setting, make sure the electrical contacts on the base of the lens and the lens mount of the camera are clean. Wipe both with a dry lint-free cloth.

However, as mentioned, it is possible your aperture ring is not free and snappy, so there is a delayed closing of the aperture. One way to test this is to remove the lens, set the aperture to the smallest aperture (e.g., f16), pull back on the aperture lever with your fingertip to open the aperture then let loose of the aperture lever. The aperture should instantly snap closed. If it's sluggish, that's a problem. Another way to test more critically with the camera is to put the camera in Av mode, with the aperture on the lens in the "A" position, then with the Av dial, set an aperture of wide open, or nearly wide open (say f2), pop up the flash and take an exposure. It should be a fairly good exposure. Now dial a stopped-down aperture (say f16) and take an exposure of the same object at the same distance with the flash popped up, and see if the exposure is good. If it is significantly overexposed, your aperture may be sluggish. However, note that not every lens is perfect, and some over- or under-expose slightly because of aperture nonlinearities, but it should be fairly close if all is working properly. I have found on all my DSLR bodies that I prefer a -0.3 exposure adjustment of my built-in flash to help prevent blowing highlights in high-contrast subjects.

I hope this helps.

-Joe-

-Joe-
Forum: Pentax SLR Lens Discussion 03-19-2018, 03:28 AM  
The Bokeh Club
Posted By k0og
Replies: 15,655
Views: 1,406,551
Hello,

I tried my K55 f1.8 along with a Vivitar 2x-22 teleconverter for 110mm to see how it worked, and am happy with the results. The lighting is not good with overcast, but there are some signs of spring. Taken with K200D, ISO800, f2.8 (x2 = f5.6).


-Joe-
(Cross-posted from the K club)
Forum: Lens Clubs 03-17-2018, 03:26 PM  
The K-Club!
Posted By k0og
Replies: 3,241
Views: 523,079
Hello,

I tried my K55 f1.8 along with a Vivitar 2x-22 teleconverter for 110mm to see how it worked, and am happy with the results. The lighting is not good with overcast, but there are some signs of spring. Taken with K200D, ISO800, f2.8 (x2 = f5.6).

-Joe-
Forum: Lens Clubs 03-03-2018, 04:39 PM  
Takumar club
Posted By k0og
Replies: 16,516
Views: 3,046,366
Thank you Ray!

Another one...

-Joe-
Forum: Pentax K-30 & K-50 03-03-2018, 07:28 AM  
Post Your K-30 Photos Here
Posted By k0og
Replies: 2,691
Views: 467,046
Crocus in bloom - spring is on the way!


Cross posted from the Takumar thread. Super-Macro-Takumar 50mm f4 on K30 (with K50 firmware), ISO100.
-Joe-
Forum: Lens Clubs 03-03-2018, 07:23 AM  
Takumar club
Posted By k0og
Replies: 16,516
Views: 3,046,366
Crocus in bloom - spring is on the way!

-Joe-
Forum: Pentax DSLR Discussion 02-17-2018, 06:20 PM  
K200D FOCUSING and etc. Questions
Posted By k0og
Replies: 7
Views: 624
Try to get back to basics... Go into the menus and do a complete reset to defaults in the "Set-up->Reset", then program your settings.

The "rumble" when you turn it on is the dust-removal on startup (adjustable in one of the menus, "Set-up->Dust Removal->Start-up action" which is apparently enabled), and the flashing light on the front when you try to take a picture is the indicator light for when the self-timer is activated (Fn button->UP control-pad button->change the drive mode to "Single frame shooting"). The beep is adjustable (or off) in the "Set-up->Beep" menu item.

Enjoy your "new" K200D - a good, solid performer in my opinion. I just "inherited" one from my daughter who no longer used it (she has a K-1, with a K-3 as a backup).

-Joe-
Forum: Pentax DSLR Discussion 01-23-2018, 06:24 AM  
Anyone else miss the K200D?
Posted By k0og
Replies: 890
Views: 146,683
Some "old" bokeh - Super-Takumar 35mm f2, wide open, K200D, ISO100.

-Joe-

(cross-posted from the Takumar club)
Forum: Pentax SLR Lens Discussion 01-23-2018, 06:22 AM  
The Bokeh Club
Posted By k0og
Replies: 15,655
Views: 1,406,551
Some "old" bokeh - Super-Takumar 35mm f2, wide open, K200D, ISO100.

-Joe-

(cross-posted from the Takumar club)
Forum: Lens Clubs 01-20-2018, 03:57 PM  
Takumar club
Posted By k0og
Replies: 16,516
Views: 3,046,366
S-T 35mm f2 @ f2 on K200D, enjoying warmer weather today...

-Joe-
Forum: Troubleshooting and Beginner Help 01-18-2018, 08:47 AM  
Pentax K1000 Diopter
Posted By k0og
Replies: 10
Views: 836
Matt,

Duhhh! I was getting your need for "-" correction confused with my need for "+" correcton! Never mind... It looks like it would be best to order a proper diopter if you are going to use the K1000 very much.

-Joe-

Wal-Mart has cheap reading glasses, +2.25, for around $5. I suggest that you take your camera in with you and hold up one of these to the eyepiece to see if +2.25 will make it clear. If so, maybe you can cut an insert by hand using a fine-toothed hack saw. That was going to be my next attempt at cutting a piece for my K1000, as I detailed in the thread Adam linked. Even if you don't buy some of those cheap glasses, you could test different diopter factors to see which will work for you (2.0 or 2.5) before you order a diopter.

-Joe-
Forum: Pentax DSLR Discussion 01-16-2018, 03:19 PM  
Anyone else miss the K200D?
Posted By k0og
Replies: 890
Views: 146,683
My daughter who is a photography professional got into the business with a K200D. She upgraded to a K3, then to a K1. She uses the K1 as her daily shooter with the K3 as a backup, and didn't want the K200D any more so recently gave it to me. She had a battery grip for it, and that does make it nice to handle. So, I stepped out the back door and took this picture with a Vivitar-A 28mm f2.8 @ f16 mounted on the K200D, sunny 16 rule (f16, 1/100 s, ISO100), DNG processed in PDCU, and jpg output converted to B&W with Silver Effex Pro 2. I will continue to use my K30 & K5 as my primary bodies, but this one is very nice, so I'll try to find a place for it.

As an experiment, I took some test shots at ISO1600 with EV-2 setting, then pushed two stops in PDCU for an effective ISO6400 output, and the results were surprisingly good with much lower noise than I expected. The push result is better than I used to get with the same process with my K100DS, so I conclude that the K200D can actually be useful at higher ISOs with careful processing of RAW DNG images.

-Joe-
Forum: Pentax SLR Lens Discussion 01-08-2018, 11:29 AM  
Is the 40mm 2.8 Pancake really that bad?
Posted By k0og
Replies: 71
Views: 6,614
Matt,

A little story...

I got my copy free (just paid for shipping) because the cement holding together the doublet lens element was separating. After disassembly I was able to soak the doublet in solvent to separate and clean the failed cement from the doublet, and reassembled it with a tiny droplet of mineral oil between the doublet elements, instead of lens cement. This was several years ago, and it's still in perfect working condition.

My copy is quite sharp, and I have no complaints. It indeed makes for an excellent lightweight option with a small camera body like the MX. An example is attached (Pentax MX, Pentax-M 40mm f2.8, Kodak Tri-X @ ISO400 processed in Rodinal 1+100 for 60 minutes semi-stand).

-Joe-

P.S. I suspect some reasons for bad reviews are that it is manual focus with a very narrow focus ring, and it's usually over-priced in the various marketplaces as compared to prices for 35mm and 50mm lenses. Neither of these reasons affected me, so I give it a somewhat high rating.
Forum: Mini-Challenges, Games, and Photo Stories 12-22-2017, 06:25 PM  
Just Black and White-ur B/W Monochrome photos here
Posted By k0og
Replies: 18,014
Views: 1,214,219
I just repaired a Pentax-M 35mm f2.8 with sticky, oily shutter blades. A good flush with lighter fluid took care of the problem! Here is one of my test shots, nearly wide open (maybe at f3.5) and at minimum focus distance, cropped, and processed in Topaz B&W Effects 2.

-Joe-
Forum: Lens Clubs 08-23-2017, 07:28 AM  
Takumar club
Posted By k0og
Replies: 16,516
Views: 3,046,366
Here is another photograph taken with my Tele-Takumar 300mm f6.3 @ f22 on a 2x teleconverter, stacked with several filters to attenuate the sun: two 4x ND, one 2x ND, one circular polarizer, one linear polarizer, mounted on a K5 on a tripod, 1/8000 sec, ISO80, daylight white balance. A small cloud was approaching the sun, so I quickly positioned myself to take some photographs during its passage, and here is one of the shots. It gives it a dirty, eerie appearance.

-Joe-
Forum: Lens Clubs 08-21-2017, 07:08 AM  
Takumar club
Posted By k0og
Replies: 16,516
Views: 3,046,366
Getting ready to take some photos of the eclipse. I'm NOT traveling anywhere, but just going into my yard at my house here in Rolla. The effect will be plenty good here to enjoy it. Here is my first test shot - Pentax K5, Tele-Takumar 300mm f6.3 lens, stacked on a 2x teleconverter for 600mm, lens stopped down to f22, with a stack of filters fitted to the front: two 4x ND, one 2x ND, one circular polarizer, one linear polarizer. This is just what I had, and it works! ISO80, 1/8000 sec., handheld. Notice the sun spots clearly visible across the face of the sun.

UPDATE: Lesson learned - CHECK YOUR SENSOR! The "sunspot" in the lower-right quadrant is a dust particle on my sensor. After cleaning my sensor, it's all good now. Here is a new image with a clean sensor, this time in color (daylight white balance).
Forum: Pentax K-30 & K-50 06-09-2017, 03:20 PM  
K50: Programs to open .DNG files?
Posted By k0og
Replies: 30
Views: 2,526
By the way... I do all this on a very old single-core Windows XP PC with 1.5GB RAM (but a 1.5TB hybrid disk), and it works fine for me. Sure, a new many-core PC with huge amounts of RAM would be faster, but not worth the expenditure for me. I just queue everything up and let it process for a while, no problem. If I were in it for commercial purposes where my processing time equates to profit, I would buy a new PC. But I'm retired, so why rush... ;)

-Joe-
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