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Forum: Pentax Q 11-30-2016, 12:16 PM  
Anyone ever have a broken Q series camera or lens?
Posted By Professor Batty
Replies: 7
Views: 999
bye-bye
Forum: General Photography 11-26-2016, 10:55 AM  
what makes Pentax ppl so defensive?
Posted By Professor Batty
Replies: 121
Views: 4,786
The real question is "Why are RAW users so defensive?"
Forum: Pentax Q 10-25-2015, 11:34 AM  
Dial mod for Q-S1
Posted By Professor Batty
Replies: 1
Views: 707
I love my Q-S1 but when they changed the function dial to a narrow ring from the Q7's barrel, it made it much easier to accidentally switch modes, especially from Manual to the dreaded BC mode. After ruining several shots this way I simply stretched a small O-ring (about 1/2") over the dial. It keeps it from rotating accidentally, yet still allows the ring to turn when you need to:

Forum: Pentax Q 09-21-2015, 06:00 PM  
Setting up the Q7 for adapters
Posted By Professor Batty
Replies: 15
Views: 1,677
That's how all slit-type shutters work. The old Speed Graphics had a slit-style shutter and you could get distortions with it in the same way. The early single lens reflex cameras did too- but only at high shutter speeds, at slower speeds one curtain would open the exposure would be made, and the trailing curtain would close, enabling flash sync. At high speeds, the curtain never opened all the way- and a slit would make the exposure, flash sync wasn't possible. That's why leaf shutters remained popular. The Q zooms and the 01 do have leaf shutters, with a very high sync speed and no rolling shutter.

I've got C and D adapters, the D mount lenses can be very sharp in the center but usually have bad resolution and fall-off at the edges. C mount lenses for movie cameras can be great, but good ones are very expensive (much more expensive than the Q lenses.) C mount lenses for cctv are usually compromised in some way: coverage, CA, curvature of field, etc. but can be useful—I have the Fujinon 9mm F1.4 and it can make very 'atmospheric' images wide open. Some C and D lenses need to be adjusted to attain infinity focus, no big deal if you've done it before but can be very hard if you haven't (and you could wreck your lens.

The 110PTX adapter is a great combo with the 50mm (have I said that before?)
Forum: Pentax Q 09-21-2015, 07:29 AM  
Setting up the Q7 for adapters
Posted By Professor Batty
Replies: 15
Views: 1,677
"Also... are any of you using PTX110 adapters on your Q? I know the 110 Pentax lenses are actually a good size for our sensors... even big enough for the Q7 sensor. I was thinking that Pentax 110 size lenses might be the best option for old glass on our small crop."

I've got PTX110 Adapters for the 18mm, 25mm, 50mm, and 70mm. They work great on my Q7 and Q-S1 but with some issues:

The PTX110 adapters need to be shimmed to achieve proper infinity focus. I simply remove the mount on the PTX110 adapter (three screws) put a layer of thin box-sealing tape over the opening, cut away any excess, and re-attach the mount.

The 110 lenses all benefit greatly from having a 'deep' lens hood—especially the 24mm which has gotten a bad rap on the lens reviews for flare. You might have to get creative on this (I used part of an old flashlight for one), it may be hard to find the right sizes except for the 70mm which accepts 49mm.

A good hardware store should have 1 and 1/4" rubber washers with a 3/8" hole which fits inside the 110PTX adapter giving an effective f-stop of 4.5, which seems to be optimal for the best balance of sharpness and diffraction with these lenses. Used at 2.8 they are a little "glowy" but quite usable.

The 110PTX adapter mount's 'tightness' in gripping the lens depends upon tension from two thin slots in the inner part of the mounting ring, which have to adjusted from time to time if you put the lens on and off a lot. Once it's set, it holds. The original Pentax mount on the 110 camera has a proper spring which did not need adjustment.

The 110 lenses do vary in performance, I've got a couple of each of the 18, 24, and 50 and found some variations in quality, one of the 18's was unusable.

The 50mm makes a great combo with the Q system: small, sharp and light. The others work well, the 70mm suffers a bit from fringing, but is very usable and gives an incredible 325mm equivalent FOV in a pocketable lens.. The 18mm works well, but not much of an advantage compared to the normal 02 zoom at 15mm. The 24mm with the diopter lens makes for a handy little macro set-up.

The electronic shutter is automatically engaged when using the PTX adapter. It can produce distortions, much like any focal plane shutter at high speeds. I haven't found it to be a problem, but I don't do much action photography. Flash sync is only at 1/13th of second, however.

The real beauty of using these lenses is the fact that the Q allows you to dial in Shake Reduction (on start-up). Not many other cameras with adapters allow you to do that so easily.With a little practice it's easy to get sharp images with the 50mm (230mm effective FOV!) at 1/10th of a second handheld.

The 110 lenses actually cover quite a bit more than the Q sensor and are optimized for center sharpness, therefore giving edge to edge sharpness and illumination, better than using these on a M4/3 camera and much better than a D-mount lens.

A sample of what the 50mm (with f4.5 stop) can do:

_IMP2763_zpsy3bblms8.jpg Photo by dktrfz | Photobucket
Forum: Pentax SLR Lens Discussion 09-14-2015, 11:55 AM  
Thoughts on a wet-weather system.
Posted By Professor Batty
Replies: 21
Views: 1,741
(There is a cheaper one but packaging is described as damaged; not sure what this implies for the state of the lens - dropped?? - or what recourse I have if things go badly. Fulfilment is by Amazon via Amazon Warehouse Sales, for what that's worth.)

I bought my Q-S1 from Fulfillment by Amazon with the packaging described as damaged, it was only a small wrinkle on the corner of the box, no big deal. I think you have the regular Amazon return options.
Forum: Digital Processing, Software, and Printing 09-12-2015, 07:31 AM  
How would you process this image to bring out the Milky way?
Posted By Professor Batty
Replies: 18
Views: 2,027
This is a really good tutorial for Milky Way photos:

How to Process Milky Way Astrophotography in Adobe Lightroom – Lonely Speck

It uses lightroom, most of his techniques would work in PS as well.
Forum: Pentax Q 09-10-2015, 08:43 PM  
C-P/Q adapter - and an additional screw-in adaptor??
Posted By Professor Batty
Replies: 10
Views: 1,068
"…a low cost 25mm fine lens I ordered…" It may well be a cs lens with an adapter.

We need some info.
Forum: Pentax Q 09-10-2015, 07:11 AM  
C-P/Q adapter - and an additional screw-in adaptor??
Posted By Professor Batty
Replies: 10
Views: 1,068
Forum: Pentax SLR Lens Discussion 09-08-2015, 12:20 PM  
Standout Pentax film-era lenses for special/vintage/classic look also 3D pop & bokeh
Posted By Professor Batty
Replies: 42
Views: 5,051
It's completely irrational but this is my dream Pentax lens:

Asahi-Kogaku Takumar 83mm f/1.9 | Andreas Isenegger
Forum: Pentax Q 09-08-2015, 09:52 AM  
C-P/Q adapter - and an additional screw-in adaptor??
Posted By Professor Batty
Replies: 10
Views: 1,068
Measurements or photos please!
Forum: Pentax Q 09-07-2015, 01:38 PM  
The search for the perfect bag continues.
Posted By Professor Batty
Replies: 13
Views: 1,581
I really like the Lowepro Adventura SH 110 II Shoulder Bag

Lowepro Adventura SH 110 II Shoulder Bag (Black) LP36865 B&H

I cut the 'rain flap' off- it didn't have any storage and only got in the way.
It can fit two Q bodies, seven lenses, extra memory and batteries, remote and even a mini flashlight.

I did put a wider and longer strap on it.
Forum: Pentax Q 09-07-2015, 01:09 PM  
New Q: Just joined the fun with a Q7
Posted By Professor Batty
Replies: 9
Views: 1,163
Here is a sample of what the Pentax 110 50mm @f4.5 (with a stop-down disc in the 110 PTX adapter) can do:

_IMP2763_zpsy3bblms8.jpg Photo by dktrfz | Photobucket

Be sure to click on magnifying glass icon for large image.
Forum: Pentax Q 09-07-2015, 07:49 AM  
New Q: Just joined the fun with a Q7
Posted By Professor Batty
Replies: 9
Views: 1,163
If you get only one non-Q lens, get the Pentax 110 50mm f. 2.8. Sharp, long throw, hand-holdable, and tiny, even with the adapter..

C mount lenses are great on the Q, but not cheap. D mount telephotos (38mm) can be good, but will be soft at the edges (nice for portraits.). CCTV lenses vary greatly in performance, usually not sharp edge to edge, but there are some exceptions.

You may find that the Promaster's performance is diffraction limited when stopped down.
Forum: Pentax Q 09-05-2015, 04:35 PM  
Good legacy zoom lens for Q7?
Posted By Professor Batty
Replies: 10
Views: 1,023
This may be your best best in something hand-holdable, not enormous, and reasonably priced:

Canon V6X17 17 102mm 2 0 C Mount TV Zoom Lens 17 102 F2 BMCC MFT Pentax Q | eBay

You'll have to add another $20 for the adapter.
Forum: Pentax Q 09-05-2015, 06:35 AM  
Pentax Q street shots - post them here.
Posted By Professor Batty
Replies: 254
Views: 60,268
Forum: Pentax Q 09-03-2015, 04:44 AM  
Q7 repair or ?
Posted By Professor Batty
Replies: 5
Views: 915
Might as well keep it. If the screen is still good, that might come in handy for a repair someday.
Forum: Pentax Q 09-02-2015, 06:38 PM  
Q-S1 any good ?
Posted By Professor Batty
Replies: 22
Views: 2,044
I guess the point I'm trying to make is that you shouldn't sell the Q system short. The "native" lenses are fine. But they are only a starting point.

The Q7 and Q-S1 work almost seamlessly with a wide variety of donor lenses. (Read the Nikon 1 forums about the difficulty of adapting and using other lenses to those cameras!) The MFT cameras will accept c-mount lenses but not with good edge to edge coverage and they are pretty pointless with d mount lenses.

And finally, there are four great (and very cheap) Pentax 110 lenses which are as nearly as good (or better) as the Q zooms. Their lack of aperture rings is less of a problem than one might think. Most critical shooters use the Q lenses wide open or nearly so.
Forum: Pentax Q 09-02-2015, 01:30 PM  
Q-S1 any good ?
Posted By Professor Batty
Replies: 22
Views: 2,044
I specifically said any manual lens. There are many cameras that do not accept donor lenses due to depth of flange to image plane distances. The beauty of the Q is that it will properly meter and have shake reduction, which very few cameras offer, even if they can accept an adapted lens.

"… minus some features such as auto focusing… "

Using that criteria the Q system has only 4 lenses!
Forum: Pentax Q 09-02-2015, 10:17 AM  
Q-S1 any good ?
Posted By Professor Batty
Replies: 22
Views: 2,044
Only having 8 lenses to choose from? The Q can use nearly any manual lens ever made, and all with shake reduction!
Forum: Lens Clubs 09-01-2015, 06:24 PM  
Fisheye Fever Club -- Flaunt your fisheye photos!
Posted By Professor Batty
Replies: 2,994
Views: 511,784
I took my Pentax SMC-Q 03 out night-clubbing:

IMGP2605_zpsslbojfhp.jpg Photo by dktrfz | Photobucket
Forum: Pentax Medium Format 08-31-2015, 01:44 PM  
Post your medium format photos!
Posted By Professor Batty
Replies: 11,125
Views: 1,803,080
That's an old image, circa 1993. I still love those 6X7 negs, I've made numerous 16x20s from them and they always get a 'wow' response from viewers.
Forum: Pentax Q 08-30-2015, 12:28 PM  
Q-S1 any good ?
Posted By Professor Batty
Replies: 22
Views: 2,044
I've got both the Q-S1 and the Q7. The Q-S1 will autofocus while doing video with the 01, 02 and 08 lenses. I think the Q7 is a little more ergonomic, but not by much.

The Q system's greatest strength is in versatility using specialized lenses. If you can get into manual focusing, it will accept virtually any lens ever made, and will make any of them image stabilized. The system is popular with birders and macro enthusiasts because of the crop factor. Here is a handheld unprocessed jpeg shot with a 90mm APO-Rodagon enlarger lens on the Q-S1: IMGP0788_zpsgxzipn3q.jpg Photo by dktrfz | Photobucket

As far as low light and action goes, like any small sensor it has its limits, although it also has an advantage: for any given field of view it will have much greater depth of field than a FF or APS-C system. Here's a link to a photo album shot in a night club, the first four pictures are with the 02 zoom and fill flash, most of the others are available light with the Pentax 110 18mm f2.8, there's one shot with the 03 fish-eye as well: Mystic Funk by dktrfz | Photobucket

I would disagree with 6BQ5 about the Q's jpegs vs. RAW., Pentax cameras in general have very good jpegs, the Q is no exception. You may be able to get somewhat better images with RAW, but I can't, at least not with PS's converter. I find that I get the best results if I don't pre-sharpen the jpegs, turning the fine sharpening setting to its weakest setting on the jpeg preset, then upsizing the image in PS, then smart sharpening as the last step.

I generally limit my ISO to 800, beyond that it gets somewhat impressionistic.
Forum: Pentax Medium Format 08-30-2015, 08:15 AM  
Post your medium format photos!
Posted By Professor Batty
Replies: 11,125
Views: 1,803,080
Epson 1640XL scanner@1600dpi, making sure the shadow detail wasn't lost, then burning the shadows in PS to achieve d-min.

The highlights were saved by the development, I didn't do anything to them other than a slight adjustment in levels to get the negatives d-max areas just barely to 255.
Forum: Pentax Medium Format 08-29-2015, 01:22 PM  
Post your medium format photos!
Posted By Professor Batty
Replies: 11,125
Views: 1,803,080
Pentax 6X7, 45mm f4 @ f8. TXP @ 250 with compensated development:

15_zpsas7cazmy.jpg Photo by dktrfz | Photobucket
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