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Forum: Repairs and Warranty Service 10-18-2018, 11:04 AM  
Dust spot under cover glass(IR cut) of Pentax Q.
Posted By alliumnsk
Replies: 3
Views: 499
I doubt very much it is glued. Pentax Q flange distance is 9.2 mm. And if total stack thickness is about 1 mm, then topmost glass surface must lie deep inside bayonet flange. I don't remember if I measured it or not, top glass appears to me to lie much shallower than ~8 mm.
My camera was never serviced.
Forum: Repairs and Warranty Service 10-17-2018, 08:34 PM  
Dust spot under cover glass(IR cut) of Pentax Q.
Posted By alliumnsk
Replies: 3
Views: 499
There's a difficult dust spot that I failed to remove many times. When illuminated by moving light source, the shadow moves noticeably, so I know this isn't problem in sensor itself. I know in many cameras there's air gap between sensor cover glass per se and IR cut filter...
Any hints about how much work it'd need to remove it?

(I don't understand at all why they it designed this way. It would make sense it they made IR cut filter oversized and fixed and sensor with thinner glass moving under it, thus making less mass for IBIS unit to move and exposing fixed glass to outside.)
Forum: Pentax Q 10-17-2018, 08:16 PM  
M12 lenses
Posted By alliumnsk
Replies: 11
Views: 4,562
I have bumped the rear of the lens into Q sensor more than one time; the camera still functions fine. Though, I would sure need to check it IBIS when turned off aligns with optical axis -- some of M12 lenses don't cover all sensor and having asymmetric vignetting is a boo-boo. I am not sure if this thing was present in my camera when it was new.
Forum: Pentax Mirrorless Cameras 03-02-2018, 10:00 AM  
Behind-the-Mount 20-40 for K-01
Posted By alliumnsk
Replies: 16
Views: 5,437
Compare this DA21 to Canon EF-M 22/2 STM: more than a stop faster, cheaper, and 105 grams vs. 150 grams while the EF-M lens has AF motor and DA21 doesn't. The lens barrel in the EF-M is small enough so it could poke inside of K-mount.
Forum: Pentax Mirrorless Cameras 02-27-2018, 11:25 AM  
Behind-the-Mount 20-40 for K-01
Posted By alliumnsk
Replies: 16
Views: 5,437
wrong


wrong

---------- Post added 02-28-18 at 01:28 AM ----------


It's not the rear element, it's exit pupil position... which people constantly confuse
Forum: Pentax Mirrorless Cameras 02-27-2018, 11:21 AM  
Pentax Si - was it ever produced?
Posted By alliumnsk
Replies: 17
Views: 7,996
Thanks, yes it works. Blocked courtesy of Nanny Government, so I had to turn on some plugins to see it.
But I don't like the concept cam xD
Forum: Pentax Q 02-27-2018, 04:30 AM  
3d printed adaptors?
Posted By alliumnsk
Replies: 10
Views: 1,760
I used such adapter printed on very cheap 3d printer and didn't like it. I guess this depends much on printer and plastic used.
Forum: Pentax Mirrorless Cameras 02-27-2018, 04:27 AM  
Pentax Si - was it ever produced?
Posted By alliumnsk
Replies: 17
Views: 7,996
The link posted by OP doesn't seem to work, I want see this so badly....
Forum: Pentax Q 11-13-2017, 03:36 AM  
How to disable LCD auto turn off
Posted By alliumnsk
Replies: 7
Views: 1,199
it's rather crude thing with RMS mount, I use M39 adapter and some duct tape to attach the Q in place of eyepiece.
Forum: Pentax Q 11-09-2017, 11:02 AM  
Any adaptable lenses make the Q truly pocketable?
Posted By alliumnsk
Replies: 9
Views: 1,802
This is small (a M12 lens xD)
Forum: Pentax Q 11-09-2017, 01:20 AM  
How to disable LCD auto turn off
Posted By alliumnsk
Replies: 7
Views: 1,199
Thanks, strangely only after your answer I was able to find it.
Actually taking time to half-press shutter to avoid camera getting in standby mode wastes more than this feature ever saves.
Forum: Pentax Q 11-06-2017, 08:51 AM  
How to disable LCD auto turn off
Posted By alliumnsk
Replies: 7
Views: 1,199
I am using the Q (first version) mounted on a microscope. And it's quite annoying that if there are no buttons pressed, it decreases brightness then switches off. Is there a menu option to disable it?
Forum: Pentax Mirrorless Cameras 07-11-2017, 03:56 AM  
turn off Live View when taning manual photos
Posted By alliumnsk
Replies: 10
Views: 4,203
Cool, didn't know it was on my Q too! Also would need to turn off immediate playback.
Need to check if it conserves power in timelapse.
Forum: Pentax Q 07-11-2017, 02:27 AM  
Pentax Survey - help our Q!
Posted By alliumnsk
Replies: 14
Views: 1,772
Done. I filled in "open the Q mount protocol to everyone" lol
Forum: Troubleshooting and Beginner Help 07-11-2017, 02:11 AM  
Rechargeables Leak?
Posted By alliumnsk
Replies: 5
Views: 831
Nickel batteries have the same alkaline electrolyte as alkaline batteries xD
Forum: Troubleshooting and Beginner Help 07-11-2017, 12:56 AM  
There's something growing on my camera bag!
Posted By alliumnsk
Replies: 21
Views: 1,850
Photos or it didn't happen! :confused:
Forum: Pentax Q 07-11-2017, 12:56 AM  
Can Pentax Q tether?
Posted By alliumnsk
Replies: 4
Views: 1,470
I have Pentax Q for a very long time and I assumed it can't tether.
But it's listed here: Pentax and Samsung Tethered Capture Plug-in for Mac OS X and Windows - DNA Software
I'd want to stay away from Adobe software. Are there other tools?
Forum: Pentax Q 12-10-2016, 03:06 AM  
Looked at patents for 8.5/1.9 and 5-15 lenses, sad
Posted By alliumnsk
Replies: 0
Views: 1,239
Here they are (note that probably none of these patent examples exactly matches production designs, but they are quite close. I think example 7 matches most the 5-15)

Espacenet - Original document
Espacenet - Original document

Usually a lens design cannot be made faster just by increasing diameter of elements. E.g. take any nifty fifty 50/1.8, the front element needs some edge thickness to be mounted, interior menisci, if continued, will run into aperture.
However, the 5-15 lens could have been easily f/1.8-2.8, the elements in the 3rd group are quite thick and it's not the focusing group, which is 2nd group which is of one element and already has enough diameter for faster f-stop. So they could be made bigger without any changes for slower apertures.
Forum: Pentax Q 12-10-2016, 02:48 AM  
Q Adapters?
Posted By alliumnsk
Replies: 9
Views: 1,694
What is canon XL? I googled and found compact camera with fixed lens and rather large camcorder.
Forum: Pentax Mirrorless Cameras 03-18-2016, 04:35 AM  
Smartphone Camera with a Q mount?
Posted By alliumnsk
Replies: 18
Views: 5,931
I use phone that is 15 mm thick and I'm happy with it; there is no real reason why it needs to be thinner. However, Pentax Q mount is terribly oversized compared to 1/1.7" sensor it houses. Phone mount should be small like M12 board mount.

---------- Post added 03-18-16 at 06:39 PM ----------


The problem is, making this detachable camera operable with various kind of phones is difficult. This is why DXO made camera for Iphones and not Androids, which are loosely standartized.
Forum: Pentax Mirrorless Cameras 03-18-2016, 04:18 AM  
This in the know - anyone aware of plans for small mirrorless?
Posted By alliumnsk
Replies: 35
Views: 9,023
It's a good idea until you remember K-mount has screwdriver and aperture levers.

---------- Post added 03-18-16 at 06:26 PM ----------


You can mount K lenses on their M mount module already....
Novoflex Lens Adapter for Pentax K Lens to Leica M LEMPENT-NT

GXR idea is very silly. It's basically battery grip with interchangeable cameras which contained to expensive components (like, say 2.4 MP or 4 MP EVF)
Forum: Pentax Mirrorless Cameras 03-18-2016, 04:10 AM  
The mirrorless advantage: Cheaper repairs!
Posted By alliumnsk
Replies: 3
Views: 4,535
Their higher-endedness is only in one component, the expensive sensor. Otherwise mirrorless cams have much less screws and levers.
Forum: Pentax Mirrorless Cameras 03-18-2016, 04:00 AM  
The next Q model sensor
Posted By alliumnsk
Replies: 43
Views: 12,147
Sure it can. However Pentax has other priorities at the moment.
Forum: Pentax Q 03-18-2016, 03:31 AM  
the Q won't turn on
Posted By alliumnsk
Replies: 21
Views: 4,275
I had a similar problem with camera turning off immediately after being turned on. I've found it was loose SD card door sensor. I put a paper do it to make it always "closed". I decided not to use warranty repair -- it could take months.
Forum: Pentax Q 03-17-2016, 07:49 PM  
M12 lenses
Posted By alliumnsk
Replies: 11
Views: 4,562
a 3d printed model for mounting M12 lenses on the Q. haven't tried it, yet. I want to make version with focusing helicoid.
Pentax Q to S?M12?Mount by nameless911 - Thingiverse
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