New DMK with Sony 174 chip

Use this section to discuss "standard" Baader/Coronado/ Lunt SolarView/ Daystar, etc… filters, cameras and scopes. No mods, just questions/ answers and reviews.
Post Reply
User avatar
Merlin66
Librarian
Librarian
Posts: 3970
Joined: Tue Dec 13, 2011 1:23 pm
Location: Junortoun, Australia
Has thanked: 173 times
Been thanked: 615 times
Contact:

New DMK with Sony 174 chip

Post by Merlin66 »



"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy  
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
User avatar
marktownley
Librarian
Librarian
Posts: 42131
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Has thanked: 20240 times
Been thanked: 10115 times
Contact:

Re: New DMK with Sony 174 chip

Post by marktownley »

Yup, that's interesting :)


Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
User avatar
Valery
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 4059
Joined: Sun Nov 18, 2012 3:13 pm
Has thanked: 156 times
Been thanked: 893 times

Re: New DMK with Sony 174 chip

Post by Valery »

marktownley wrote:Yup, that's interesting :)

Too slow fps. Definitely not interesting thing.


"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
User avatar
Merlin66
Librarian
Librarian
Posts: 3970
Joined: Tue Dec 13, 2011 1:23 pm
Location: Junortoun, Australia
Has thanked: 173 times
Been thanked: 615 times
Contact:

Re: New DMK with Sony 174 chip

Post by Merlin66 »

May be of more interest to the SHG guys.....
Where each frame is a final image, we don't have the luxury of stacking to improve the image depth (Yet)


"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy  
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
User avatar
marktownley
Librarian
Librarian
Posts: 42131
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Has thanked: 20240 times
Been thanked: 10115 times
Contact:

Re: New DMK with Sony 174 chip

Post by marktownley »

It does 54fps Valery...


Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
User avatar
Gordon Ewen
Almost There...
Almost There...
Posts: 539
Joined: Sun Apr 20, 2014 10:15 am
Location: Moggerhanger, UK
Been thanked: 257 times
Contact:

Re: New DMK with Sony 174 chip

Post by Gordon Ewen »

The ZWO camera with the IMX174 chip runs nearly 3x faster on USB3. Didn't see a price for the DMK camera on the IS website.
Gordon


Lunt 152 DSII Ha scope, Orion Optics 12" ODK, C9.25
Skywatcher EQ8 x 2
Lunt 1 1/4" Herschel Wedge, 2x,3x Barlow, 5x Powermate, Baader Ca filter and solar film.
https://www.flickr.com/photos/74614447@N02/
User avatar
Valery
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 4059
Joined: Sun Nov 18, 2012 3:13 pm
Has thanked: 156 times
Been thanked: 893 times

Re: New DMK with Sony 174 chip

Post by Valery »

Gordon Ewen wrote:The ZWO camera with the IMX174 chip runs nearly 3x faster on USB3. Didn't see a price for the DMK camera on the IS website.
Gordon
Yes, ZWO's camera is 3x !!!! faster. So, the IS camera is outsider. And I am sure that IS is also more expensive. ZWO also has a
cooled ( -35C to ambient) variant ! +$300 however.


Valery
Last edited by Valery on Fri Oct 16, 2015 5:15 pm, edited 1 time in total.


"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
User avatar
marktownley
Librarian
Librarian
Posts: 42131
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Has thanked: 20240 times
Been thanked: 10115 times
Contact:

Re: New DMK with Sony 174 chip

Post by marktownley »

fair enough then :)


Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
User avatar
Merlin66
Librarian
Librarian
Posts: 3970
Joined: Tue Dec 13, 2011 1:23 pm
Location: Junortoun, Australia
Has thanked: 173 times
Been thanked: 615 times
Contact:

Re: New DMK with Sony 174 chip

Post by Merlin66 »

I asked TIS what the frame rate would be with an ROI of 1920 x 24 pixel (for SHG applications)
They sent me an example taken at >800fps!
How does that compare with the ASI 174?


"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy  
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
User avatar
Montana
Librarian
Librarian
Posts: 34527
Joined: Mon Oct 17, 2011 5:25 pm
Location: Cheshire, UK
Has thanked: 17526 times
Been thanked: 8763 times

Re: New DMK with Sony 174 chip

Post by Montana »

:shock:


User avatar
michael.h.f.wilkinson
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 2559
Joined: Wed Jul 11, 2012 8:36 pm
Been thanked: 1 time

Re: New DMK with Sony 174 chip

Post by michael.h.f.wilkinson »

Merlin66 wrote:I asked TIS what the frame rate would be with an ROI of 1920 x 24 pixel (for SHG applications)
They sent me an example taken at >800fps!
How does that compare with the ASI 174?
I think the ASI174MM might beat that IF the exposure time is short enough. Assuming the data rate is the limiting factor, using linear extrapolation form the frame rate at 640x480 (397 FPS) we get 2,646 FPS :shock: (370 microsecond exposure time). I get the feeling TIS missed the boat on this one.


Solar kit: GP-C8 with Thousand Oaks Solar filter, APM 80mm F/6, Lunt Herschel Wedge, Solar Spectrum 0.3Å H-alpha filter, Beloptic Tri-Band ERF (80mm free aperture), Thousand Oaks 90mm ERF, Coronado SolarMax II 60mm with Double Stack Unit. Lunt straight B1800 Ca-K module.
fjabet
Im an EXPERT!
Im an EXPERT!
Posts: 260
Joined: Sat Dec 14, 2013 5:27 pm
Been thanked: 21 times

Re: New DMK with Sony 174 chip

Post by fjabet »

The Basler 1920 can go at more than 1000 fps with AoI :)


User avatar
Merlin66
Librarian
Librarian
Posts: 3970
Joined: Tue Dec 13, 2011 1:23 pm
Location: Junortoun, Australia
Has thanked: 173 times
Been thanked: 615 times
Contact:

Re: New DMK with Sony 174 chip

Post by Merlin66 »

The issue I see with the higher frame rates (for SHG) is getting enough signal, and ending up with both lack of contrast and low SNR.
It's OK when you can stack hundreds of frames to improve the SNR.
What does the histogram of a single frame look like at 1000fps?


"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy  
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
fjabet
Im an EXPERT!
Im an EXPERT!
Posts: 260
Joined: Sat Dec 14, 2013 5:27 pm
Been thanked: 21 times

Re: New DMK with Sony 174 chip

Post by fjabet »

We usually have plenty of light in solar imaging. With the HaT and the PST Etalon my exposure is about 3ms at F/D 27.5. That gives room for higher throuput.
In white light it is sub ms.
The IMX174 presents very good performances with full 24db gain.


User avatar
Merlin66
Librarian
Librarian
Posts: 3970
Joined: Tue Dec 13, 2011 1:23 pm
Location: Junortoun, Australia
Has thanked: 173 times
Been thanked: 615 times
Contact:

Re: New DMK with Sony 174 chip

Post by Merlin66 »

OK.
Can any ZWO ASI 174 user confirm the frame rates when using a ROI of 1920 x 24 pixel????
I see this as a significant opportunity to develop a high speed SHG based on a nodding mirror scanner. If a frame rate is >500 fps then a scan of 4sec would give a good resolution and a possibility of obtaining >12 complete scans per min. These (as hopefully the solar feature movements would be small in a 1 min time frame (?) would then allow stacking of the individual spectral frames prior to image extraction.)


"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy  
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
fjabet
Im an EXPERT!
Im an EXPERT!
Posts: 260
Joined: Sat Dec 14, 2013 5:27 pm
Been thanked: 21 times

Re: New DMK with Sony 174 chip

Post by fjabet »

Can't tell you for the ZWO, but the Basler achieved 2200 fps at this size (with internal 12 bits processing, not 10 bits).


User avatar
Astrograph
Im an EXPERT!
Im an EXPERT!
Posts: 241
Joined: Tue Aug 05, 2014 1:00 pm
Location: London
Been thanked: 46 times
Contact:

Re: New DMK with Sony 174 chip

Post by Astrograph »

I have to admit to being bias but I think the best IMX174 camera was the first one made with the chip and that is the PGR Grasshopper 3. I have never tried the Basler but I would take a PGR over a ZWO any day. As for IS, all I ever hear about IS cameras is how much noise they generate.....


Post Reply