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Forum: Pentax SLR Lens Discussion 06-07-2017, 07:45 PM  
Odd problem: DA 16-85 and Kenko (Tamron) Pz-AF 1.5x Teleplus SHQ
Posted By Stone G.
Replies: 8
Views: 556
I am not too sure that this is the full explanation. I believe that we see an example of a non-matching lens-converter pair. I have the same TC as theOP and have the same experience with my DA* 200/2.8(!) lens: It hunts for focus but won't lock. Only "remedy" is to push the AF button several times until it eventually locks.

Then I bought the Pentax 1.4 X AW converter, which per Pentax specifications is compatible with the DA* 200, and indeed: I have never had any problems with this pair. As I have said before, there are lenses and teleconverters, and then there are MATCHING lenses and coverters.

And I continue to be deeply impressed, that the Pentax engineers have managed to make their TC compatible with so many Pentax lenses, as the specifications tell us.
Forum: Pentax Camera and Field Accessories 05-25-2017, 09:34 AM  
O-GPS1 observations
Posted By Stone G.
Replies: 7
Views: 632
@scoman1
In the Horizonthal Alt-Azimuth coordinate system, Altitude is the angular elevation above the horizon, while Azimuth is the compass bearing.


So, here's a screen dump of (a small portion of) the output from Phil Harvey's ExifTool (executable version) where the camera lens was pointing 24.5 degrees above the horizon at a compass bearing of 212 degrees.
Forum: Pentax Camera and Field Accessories 05-24-2017, 10:02 AM  
O-GPS1 observations
Posted By Stone G.
Replies: 7
Views: 632
Scorman1 is right: The camera has to detect Altitude and not just Azimuth in order to track properly. Further: The Alt. value is indeed embedded in the Exif-data, and it shoul be easy to display. (In ExifTool, look for "Pitch angle".

My solution is to use an inclinometr app on my smart phone.
Forum: Pentax Q 04-09-2017, 04:01 AM  
My Pentax 08 Wide Zomm has arrived - FINALLY!!!
Posted By Stone G.
Replies: 13
Views: 1,328
Thank you for encouraging words, barondla. This lens really appeals to be explored - how nice then, that I can have my Q-system with me almost anywhere I go almost all the time.
Forum: Pentax Q 04-06-2017, 02:12 PM  
My Pentax 08 Wide Zomm has arrived - FINALLY!!!
Posted By Stone G.
Replies: 13
Views: 1,328
Or, rather: I am still exploring/learning how to use this little gem properly. Perhaps a few too many pictures in one post, but you know, I'm like a kid having been let loose in a candy store:





#1



#2



#3



#4



#5



#6



#7



#8 - Strongly cropped






#9 - A good deal cropped



#10


Tamron, many years ago used the slogan "Small but Mighty" about their Adaptall-2 SP 35-80mm CF Macro lens (Model 01A). These words come to my mind while I am playing with the smc Pentax 08 Wide Zoom lens. All pictures were taken with the Pentax Q-S1.
Forum: Pentax Q 03-29-2017, 10:14 AM  
And the 06 Telephoto Zoom arrived.
Posted By Stone G.
Replies: 15
Views: 1,624
Whatever "they" say about the Pentax Q system as such, I think everybody should admit that the Q-series High Performance lenses are truly gems of optical designs and craftmanship. Opinions may differ about the 02 standard zoom, but I personally would include it amongst the gems.
Forum: Pentax Q 03-29-2017, 05:03 AM  
My Pentax 08 Wide Zomm has arrived - FINALLY!!!
Posted By Stone G.
Replies: 13
Views: 1,328
Thank you all for congratulations and great sample images. I have no doubt that this lens was worth waiting for, and as CarlG says, now the time has come for me to explore!!!



Well, offerings for Q cameras and accessories here in Denmark from serious retailers have been non-existing for a while, and supplies throughout Europe seem to be dwindling rapidly now. So, I have become quite acustomed to self-import Q-stuff from dealers in Japan. After domestic VAT and post office fees for customs handling, there is no financial advantage to that and one further gets the goods without a European Warranty.


But then I saw this 'Special Order' offering on Pentax Q high-performance lenses from SRS Microsystems in the UK - an excellent supplier of a good deal of my Pentax Gear. SRS did warn that there would be an extra delivery time, (B&H Photo has a similar offering currently) but the price was fair, and I jumped. SRS then confirmed the order to me and ordered the lens from Pentax Europe. Pentax Europe then confirmed to SRS and ordered the lens from Pentax Japan......


......anyway, I now have my lens with a valid, European warranty and I think I got it slightly cheaper than if I had imported it myself from Japan.
Forum: Pentax Q 03-28-2017, 01:46 PM  
My Pentax 08 Wide Zomm has arrived - FINALLY!!!
Posted By Stone G.
Replies: 13
Views: 1,328
I ordered this lens as a 'special order' - and special it was: It took two months and ten days from order to delivery. But now it is finally here to 'complete' my Pentax Q Go-Anywhere Bag:






06 Telephoto Zoom on Pentax Q10; 08 Wide Zoom on Pentax Q-S1; 02 Standard Zoom as in-betweener / back-up; circular polarizing filter,
4 spare batteries; IR remote control; +10D close-up lens and home-made LCD loupe / shade. All in a small bag measuring 23 x 16 X 13 cm.






I think this lens is going to give me much fun.
Forum: Photographic Technique 03-07-2017, 06:14 AM  
K-01 for solar eclipse
Posted By Stone G.
Replies: 6
Views: 671
As others have said: Use SAFE dedicated solar film or SAFE dedicated solar glass filters for the Sun:





With such filters you may get this at 600mm f/11 with ISO = 100 and t = 1/125s:



Pentax K200D with Tamron Adaptall-2 SP 300mm f/5.6 lens and 2X Tamron SP F-Series teleconverter.


Without this filter (Optical Density, D=5) I would have needed an exposure time of 1/125s divided by 100,000!!! Are you sure you got a black rather than a blank image?


Of course, during totality things are very different and you must take off the filter - but ONLY DURING TOTALITY.
Forum: Pentax Q 03-02-2017, 02:24 PM  
IQ with adapted lenses?
Posted By Stone G.
Replies: 23
Views: 1,897
I have the Pentax Q adapter and have tried our many lenses of varying focal lengts. Based upon my experiences, I fell pretty safe when I say that the leaf shutter will not solve your issues. With adapted lenses one shuold take into account that

A) Resolution as we would normally perceive it is measured in lines per image height and the 1/2.3" and 1/1.7" sensors of our Qs are actually much more demanding in that respect than an APS-C, let alone an FF sensor. Your Q lenses have been specifically designed for the small sensor format.

B) Your 85 and 135mm lenses effectively serve as very long telephoto lenses on a Q and thus, more sensitive to atmospheric haze and turbulence. Rather than playing with the WB, you should probably try to enhance contrast and clarity using Curves and Levels in the developing/post-processing of your images.
Forum: Pentax Q 02-27-2017, 10:51 AM  
Let's share shots with Q!
Posted By Stone G.
Replies: 5,683
Views: 772,757
There is an instruction here at PF: Using the K-Mount Adapter for Pentax Q - Articles and Tips | PentaxForums.com


And here's a copy of the manual that followed my adapter: http://www.gyes.eu/documents/pentaxqkadapter.pdf
Forum: Pentax Q 02-17-2017, 01:46 PM  
Q adapters
Posted By Stone G.
Replies: 31
Views: 3,075
To take the last issue first: On my Q10 I only have the choice (in Custom Menu item 13) between electronic shutter disabled or electronic and leaf shutter both enabled at the same time. On the other hand, my Q-S1 gives me three options (in Custom Menu item 1): Electronic shutter only, Leaf shutter only or both enabled at the same time.


The second issue with vignetting with tele lenses, I don't understand. I have never experienced that to any noticeable degree, at least as I find it. Here are some test shots with my Q10 and the Pentax Q adapter for K-mount lens:


Pentax Q10 with Pentax DFA 100mm f/2.8 lens



Pentax Q10 with Tamron Adaptall-2 SP 80-200mm f/2.8 (Model 30A) at 200mm



Pentax Q10 with Pentax DA* 200mm f/2.8 lens



Pentax Q10 with Tamron Adaptall-2 SP 350mm f/5.6 (Model 06B) mirror lens.
Forum: Pentax Q 02-14-2017, 10:16 AM  
Q adapters
Posted By Stone G.
Replies: 31
Views: 3,075
Yes., for those who have the DA* 300 or the DA* 60-250, it is a simple matter - - - at least until one looses that little adapter and needs a spare. What then?
Forum: Pentax Q 02-14-2017, 04:34 AM  
Q adapters
Posted By Stone G.
Replies: 31
Views: 3,075
About that leaf shutter and other differences: It may be timely to recall attention to the staff review in 2013 here at PF,

Pentax K to Q-mount Adapter Review - Introduction | PentaxForums.com Reviews


For me, it is crucial that the leaf shutter allows for:


1. Flash Synchronization at shutter speeds down to 1/1000s
2. Very long exposure times up to 30s (32s in Bulb mode)


No other adapter than the original Pentax one will allow for that. And yes, it is expensive but in my opinion well worth the price. My only rant is, why does it have to be so difficult (at least here in Europe) to get hold of the tripod mount adapter? I had to self-import mine from Japan.
Forum: Pentax Q 02-13-2017, 10:53 AM  
Don't forget firmware updates,
Posted By Stone G.
Replies: 15
Views: 2,095
Forum: Pentax Q 02-09-2017, 10:20 AM  
Will Ricoh realign resources to further Q development after KP release?
Posted By Stone G.
Replies: 81
Views: 6,590
Well, isn't that where the Catch 22 is: we are some who truly appreciate the Q ecosystem for what it is today and for how it could orgaically evolve over time - but we are obviously too few to make the Q a sustainable business in our parts of the world. Now then, should Ricoh/Pentax come up with 'somthing exciting' for the future Q, what chances are there, that we current Q enthusiasts, won't be deeply disappointed???
Forum: Pentax Q 02-07-2017, 06:00 AM  
My Q-S1 is on its way.
Posted By Stone G.
Replies: 44
Views: 3,231
Welcome to the ranks of Pentax FanatiQs.....
Forum: Photographic Technique 02-06-2017, 03:11 PM  
Macro Extention tubes?
Posted By Stone G.
Replies: 25
Views: 1,414
How much more magnification are you aiming at? You will need some fairly long tubes to get a substantial extra reach with a 105mm lens. Besides, extension tubes with electric contacts are rare and expensive. If your lens has an aperture ring, you might consider to work fully manual.

With my Pentax DFA 100mm macro I get fair results with the Pentax A-2SX and the HD DA 1.4 teleconverters, which also let me keep a comfortable working distance.
Forum: Troubleshooting and Beginner Help 02-06-2017, 02:52 PM  
no card in camera??
Posted By Stone G.
Replies: 7
Views: 718
Or, try a full format (different from.quick format) in the computer. But before anything else, try another card if you have one.

If neither works, it could be either bent/damaged or dirty contacts in the camera?

Hope you find a fix so that you can share some snowscape images wit us.
Forum: Lens Clubs 02-05-2017, 12:25 PM  
Adaptall Mount Club (Tamron).
Posted By Stone G.
Replies: 3,488
Views: 542,470
Splendid images Jean. Now, on your K-1, one can really see how wide this 17mm lens was on 35mm film in its time. (And still is on digital FF of course).
Forum: Pentax Q 02-05-2017, 12:18 PM  
Don't forget firmware updates,
Posted By Stone G.
Replies: 15
Views: 2,095
And right you were! I never noticed this section way down the page with Q-lens firmware updates, but I now updated one 02 lens on my Q10 after which it duly shows firmware version 1.01. Inserting the lens in my Q-S1, I now also read the same firmware version here. It so happens that I have two 02 lenses, because I had to take one more copy together with my Q-S1 and that lens still showed Ver. 1.00 on both cameras until I made yet another update with that lens mounted on the camera.


So, monochrome and you were right: The firmware does indeed reside in the lenses.


Thanks a lot barondla, I'd never found this update on my own.

---------- Post added 02-05-17 at 08:29 PM ----------

Hmm..........and now to see what difference this update for "Improved stability for general performance" means to my future 02 images. I never found that I had any issues with the 02 lens as it was.
Forum: Pentax Q 02-05-2017, 08:02 AM  
Don't forget firmware updates,
Posted By Stone G.
Replies: 15
Views: 2,095
I don't think that Q-lenses carry any firmware themselves, that woul be embedded (or 'attached' as Ricoh puts it) in the camera firmware.

Anyway, there never was any firmware update for the Q-S1 so, both camera and lens firmware (for my 02and 06 lenses) read version 1.00 on my Q-S1.

On my Q10 camera firmware reads ver. 1.03 while lens versions are still 1.00. The 1.03 update included adaptability of the 08 Wide Zoom. When I receive my copy, ordered new 3 weeks ago, we shall see, but I am pretty certain that the lens firmware will still read ver. 1.00 on both my Qs.
Forum: Pentax Q 02-04-2017, 06:53 PM  
My Q-S1 is on its way.
Posted By Stone G.
Replies: 44
Views: 3,231
Regarding Q-macro: One other option is the use of a +10D dioptre lens together with the 06 telephoto zoom. A two element multicoated achromat´would of course be optimal, but so far, I have been doing with a cheap Chinese 1-element, uncoated lens. There will often be some purple fringing then, but no more than can easily be handled in post processing.


A good thing with the advanced Q-lenses is that flash can be synchronized down to a /2000s and thus, one can use the flash to freeze movement and hand shake even in broad daylight. Working distance is convenient and the tiny Q-pixels allow for quite some cropping:



Pentax Q-10 image: Mosquito attack (yes, it is my own arm!). Cropped image.
Pentax 06 telephoto zoom @ 24mm FL with +10D close-up lens. Flash on; 1/2000s, f/8.0, ISO 100


Pentax Q-10 image: Cucumber spider, (body is some 2.5mm long). Cropped image.
Pentax 06 telephoto zoom @ 28 mm FL with +10D close-up lens. Flash on; 1/2000s, f/8.0, ISO 100

Regarding the Pentax 02 Standard Zoom: I find it much better that its general reputation. Is this really that bad?:



Pentax Q10 with 02 Standard Zoom @ 15mm FL



Pentax Q10 with 02 Standard Zoom @ 6mm FL.

I like my 02 lens a lot - so much that I have decided NOT to go for the 01 lens. 'Instead' I have placed an order for the 08 Wide Zoom at srs microsystems. It's on 'special order' and the wait is looong - so far 3 weeks since I placed my order.......
Forum: Troubleshooting and Beginner Help 01-29-2017, 09:35 AM  
Pentax Q Electrical problems.
Posted By Stone G.
Replies: 6
Views: 580
I have a Q-S1 that suddenly requires a reset of date and time each time I exchange batteries. I strongly suspect that this problem can be traced back to the internal battery circuit: Either a broken lead or a collapsed internal battery. Or, perhaps a collapsed capacitor? The poblem with collapsed capacitors was known with some of the earlier Pentax DSLRs and would cause start-up problems of the types described here.

Your problem seems somewhat similar, and in both our cases I am afraid that a propessional repair is the only real way out. Question then is, whether such is worth the cost? Anybody in this forum with experiences in Pentax Q repair costs?
Forum: Pentax K-1 01-14-2017, 03:10 AM  
Astro mode: longest possible exposure?
Posted By Stone G.
Replies: 51
Views: 2,728
But then your compass heading is indeed 30 degrees off what it should have been(?)
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