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11-27-2018, 04:18 PM   #46
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Thanks for such an interesting article and info Geo. With this "You shouldn't bother about the Q IR-filter" are you saying it isn't necessary and doesn't work as well as with the NX mini?
Incidentally - what did M42 Orion Nebula do to upset you
Dave

11-27-2018, 08:07 PM - 1 Like   #47
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Found a page describing how to remove the IR filter from a Q. You may need to run this through google translate if you donít read Japanese.

Part 1
http://app.f.m-cocolog.jp/t/typecast/1715729/1725916/93113796

Part 2
http://app.f.m-cocolog.jp/t/typecast/1715729/1725916/107334585

Part 3
http://snap.nophotonolife.com/?p=1920



Last edited by 2old4toys; 11-27-2018 at 08:48 PM.
11-28-2018, 12:28 PM   #48
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QuoteOriginally posted by geo444 Quote
.
The Pentax Q(x) with their tiny sensors are Not at their best for Wide Field Astro-Photography
for Wide Field, you'd better use an APS-C (or a FF) sensor !
+ you'd find more choice in (Ultra-)Wide-Angle lenses for large sensors (Samy)

But the Pentax Q(x) with their tiny sensors are at their Best for Long Reach Astro-Photography
Why ?
Simply because thousands of Deep Sky Small Objects will Never fill an APS-C sensor !
Even mounted on a very affordable SkyWatcher 1000mm Newtonian !
+ these tiny sensors are Very Sensitive ~ DxO ISO 5680 FF-Equivalent for the 1/2.3" in the Pentax Q, Q10 !

a Pentax Q10 w/ the Pentax Adapter on a Skywatcher 200/1000 Newtonian :
= 50 x 30 seconds @ ISO 1600 stacked with DSS 3.2
it's Messier 27 Nebula at 1350 L-Y :



Other (9) Long Reach Astro-Photographies taken with a Pentax Q10 :
The Astro-Q Club! - Page 10 - PentaxForums.com

Good Luck !
Are you using the Q as "prime focus" or "projection" ? I'm assuming the former.
11-29-2018, 09:29 AM - 1 Like   #49
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QuoteOriginally posted by 2old4toys Quote
Found a page describing how to remove the IR filter from a Q. You may need to run this through google translate if you donít read Japanese.

Part 1
?Q???????IR???????????: ?????

Part 2
??????Q?????: ?????

Part 3
http://snap.nophotonolife.com/?p=1920

Good find! This removes the IR cut filter by literally cutting out the glass! I was hoping that someone figured out a way to remove the whole retaining frame that the IR glass sits in .. to avoid the broken glass mess!
In any case it's the retaining frame that is in the way of my 220 FE lens to focus to infinity.

02-14-2019, 09:48 PM - 1 Like   #50
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QuoteOriginally posted by geo444 Quote
.
The Pentax Q(x) with their tiny sensors are Not at their best for Wide Field Astro-Photography
for Wide Field, you'd better use an APS-C (or a FF) sensor !
+ you'd find more choice in (Ultra-)Wide-Angle lenses for large sensors (Samy)

But the Pentax Q(x) with their tiny sensors are at their Best for Long Reach Astro-Photography
Why ?
Simply because thousands of Deep Sky Small Objects will Never fill an APS-C sensor !
Even mounted on a very affordable SkyWatcher 1000mm Newtonian !
+ these tiny sensors are Very Sensitive ~ DxO ISO 5680 FF-Equivalent for the 1/2.3" in the Pentax Q, Q10 !

a Pentax Q10 w/ the Pentax Adapter on a Skywatcher 200/1000 Newtonian :
= 50 x 30 seconds @ ISO 1600 stacked with DSS 3.2
it's Messier 27 Nebula at 1350 L-Y :



Other (9) Long Reach Astro-Photographies taken with a Pentax Q10 :
The Astro-Q Club! - Page 10 - PentaxForums.com

Good Luck !
geo444: Was M27 taken in prime focus? And how were you guiding? I have Baader Hyperions with adapters to use the Q10 afocal ( imaging through the eyepiece) on either my 8SE or Astrotech72mm.


Awesome images by the way. You certainly figured it out!
6 Days Ago   #51
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@gcisko you might find this Fuji fisheye lens interesting for all sky photography. It is scavenged from old security cameras. Paid ~$70 for it. Absolutely love it. It requires a C mount to Q adapter. There is no shutter so the Q will revert to the electronic one. Unfortunately this imposes a 2 second max shutter speed. But, the Fuji is f1.8 so it should be workable. Lenses is fixed focused, but can be fine tuned by slightly unscrewing from C mount adapter. Probably 1/2 a millimeter is all that is ever needed. Nice, sharp, and cheap! Plus looks so cool on a Q! This will also fit micro 4/3 bodies and give a full circle image.
Adapted lenses tested on the Q : the reference thread - Page 73 - PentaxForums.com

Thanks,
barondla
4 Days Ago - 2 Likes   #52
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Pentax Q & Q10 : IR-cut Filter Removal !

QuoteOriginally posted by dc1500 Quote
Thanks for such an interesting article and info Geo...
With " You shouldn't bother about the Q IR-filter " are you saying it isn't necessary and doesn't work as well as with the NX mini ?
.
Thanks DC ! Sorry, apologies for the delay...
All the Photos Posted on Chassimages have been lost... and I sold my Macro Bellows 4 years ago...
Took me a long time to make a Drawing, I hope everyone will find it clear ?

Here, things are Not Simple at all !
From Buldings Crashing down after some rain... to Yellow Jackets...
Crashed Buildings were Newer than where I live !

I just meant it was as simple as for the NX-mini to Remove the IR-Filter on Q, Q10 !

/!\ The photo posted by 2old4toys is somewhat misleading :
- you have to Cut the Box at 1,1 mm from its Edges to Avoid Breaking the Filter,
your Sensor'll be full of Glass Crumbs !

My Howto / DiY page " Remove Q10 IR-cut Filter " not totally finished, but at least online :
Pentax Q, Q10, most Sensitive sensors ILC
You just need a Cutter + some time...
is my Drawing Clear ?

Compare the Sensitivity of Sensors per Area, 2 methods :
Camera Sensor Comparison Tools
Litho+Etch Precision increase Sensitivity

The only hope to go over the 30 sec. Stupid Limitation of the Q, Q10, Q7... :
Pentax-Q10-v1.03-FirmWare-Disassembly
Disassembling is only the very First Step...
... who knows a "C" Decompiler suitable for MIPS RISC Processors ?

QuoteOriginally posted by dc1500 Quote
Are you using the Q as "prime focus" or "projection" ? I'm assuming the former.
.
You're right, it's Prime Focus : many other infos to find on my DPReview Galleries :
geo444: Galleries: Digital Photography Review : Digital Photography Review

QuoteOriginally posted by gcisko Quote
geo444: Was M27 taken in prime focus? And how were you guiding ?... I have Baader Hyperions with adapters to use the Q10 afocal ( imaging through the eyepiece ) on either my 8SE or Astrotech 72mm... Awesome images by the way. You certainly figured it out !
Yes Gcisko, all my AstroPhotos taken in prime focus.
I'm Guiding with a ToUCam Philips mounted on the SkyWatcher finderscope
SoftWare is PHD from StarkLabs
If you are able to achieve a Reliable Station Setting, it's not necessary for 30 sec. subs ?

I never tried afocal, you should, just to get an idea on the results ?
Thanks Gcisko !
3 Days Ago - 1 Like   #53
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The photo of the Q sensor with the IR filter removed is very informative as is the drawings you made. Much appreciated! Do you need to lay a replacement pane of glass where the Ir cut filter was to regain infinity focus with PQ lenses for daytime IR photography? Or is it not an issue for you as manual focusing is possible on lenses or telescopes you use that twist beyond the usual infinity?

Encouraging and now looking for another Q for IR modding. Knowing now that cutting the plastic shroud for the sensor is sufficient, a very simple procedure vs many other cameras IR filter removals. (Thank heavens your process does not involve actual broken glass).

Thanks again for sharing. I think this opens the door for many Q owners on this forum to mod their Qís, though market for 2nd hand Qís are going to become more rare as a result.

3 Days Ago   #54
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Pentax Q & Q10 : IR-cut Filter Removal !

QuoteOriginally posted by 2old4toys Quote
The photo of the Q sensor with the IR filter removed is very informative as is the drawings you made. Much appreciated !... (Thank heavens your process does not involve actual broken glass)... Thanks again for sharing.
.
Hi 2old4toys ! Many Thanks for your encouraging kind words !

QuoteOriginally posted by 2old4toys Quote
Do you need to lay a replacement pane of glass where the Ir cut filter was to regain infinity focus with PQ lenses for daytime IR photography ? Or is it not an issue for you as manual focusing is possible on lenses or telescopes you use that twist beyond the usual infinity ?
.
I think you'll have to make a Definitive / Irreversible Choice :
Remove its IR-cut filter... and your Q, Q10 is definitely Dedicated to Astrophoto !
Manual Focus is the usual way for AP...
Not an issue !

QuoteOriginally posted by 2old4toys Quote
Encouraging and now looking for another Q for IR modding. Knowing now that cutting the plastic shroud for the sensor is sufficient, a very simple procedure vs many other cameras IR filter removals. (Thank heavens your process does not involve actual broken glass) I think this opens the door for many Q owners on this forum to mod their Q’s, though market for 2nd hand Q’s are going to become more rare as a result.
.
Before making a Definitive / Irreversible Choice by maiming your Q, Q10
I suggest you and every Pentaxian interested in Astrophoto AND/OR in Landscape IR PhotoGraphy
Please... Read Carefully my page about the NX mini
Samsung-NX-mini-TOP-Infra-Red-ILC

+ NX-mini are easy to find at $100€ or less
+ NX-mini IR-cut removal is 100% Fully Reversible
+ NX-mini's AF is still 100% Reliable after its IR-cut removal
>> that opens to you the door to Fantastic Hand-Held Terrestrial IR PhotoGraphy -vs-
with the IR-Cut in place + a R72 Filter you're restricted to High-ISO-Tripod :
landscape-IR-photography - Google Search
Best 25+ Infrared Photography ideas on Pinterest | Pink trees, Beautiful nature spring
+ NX-mini's Wider Sensor mounted on a 800 mm will cover Veil Nebula's 2 parts :
Photos tagged with "nx-mini": Galleries: Digital Photography Review
+ NX-mini's Bigger Pixels are Far Less Demanding from Atmosphere Stability :
M1 Crab Pentax Q10: geo444: Galleries: Digital Photography Review
+ NX-mini's Bigger Pixels are Far Less Demanding on Eq-Mount-Precision :
Pentax Q, Q10, most Sensitive sensor ILC
+ NX-mini can hold 240 seconds Exposures !
+ NX-mini's LENR is Fully Cancelable !
+ NX-mini's Huge Battery will last a Winter-Night long !
+ NX-mini's Wired Remote Controls are easy to find at $25€ or less
+++ I'll write 1 page : How to add a T2-Mount-Thread M-42x0.75 for $25€ on your NX-mini
... this is crucial because Sam's MA4NXM Adapters are out of stock...

- But Yes, the Q, Q10's sensors are 44.4% More Sensitive !...

If I were You ?......


Last edited by geo444; 2 Days Ago at 11:55 AM.
1 Day Ago   #55
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A Samsung NX mini would mean investment in another system though. I hope a small cut filter dropped onto the Q sensor housing secured with tape will allow full spectrum IR auto focus on my existing PQ lenses.

Now where do I get an inexpensive collection of various wavelength small cut IR filters from?
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