Kim Miau
Pooh-Bah
Reged: 07/17/06
Posts: 1261
Loc: Malaysia
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Quote:
Thanks everyone for the posts.....and thanks QHY for such a great camera.....I really appreciate the improved processing Dennis.....your great! I hope to get more time to image in the next few weeks. Hopefully practice and use will bring out even more great images from this camera. I really appreciate the time QHY took to write the Maxim plugin.....really a big help.
Later.....
Yeah, credit to QHY! If nothing changes my mind, I will study the same course in the future and be his worker one day. 
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Robin Lee - Cyclops Optics
Meade 8" LX90
QHY5L-II + IMG0H + QHY8L
Have access to...
Mewlon 300 + EM500
TMB 175 f/8 + Gemini G41
And... bad weather.
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bill w
Postmaster
Reged: 03/26/05
Posts: 10277
Loc: southern california
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Quote:
Here is a testing image with no uncovering and covering of the objective. Clearly shows the need for a shutter.
The QHY 8 ccd does not need a shutter as do the rest of the sony chips as they are not full frame like the 6303E is.
not sure i follow. can you explain what's going on in this image?
bill w
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-bill w
nexstar 8 GPS
canon 300D, Toucam Pro II
SXV-H9C, H9, SX Lodestar autoguider, SX-AO, DMK 51
FS 102 (OLV), FS60 CSV, 8" LX200R, Lunt 60/50 double stacked PT B1200, Losmandy G 11, ASA DDM60
http://astro.whwiii.net/
image processing monitor calibrated to just differentiate darkest boxes:
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bill w
Postmaster
Reged: 03/26/05
Posts: 10277
Loc: southern california
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Quote:
Here is a testing image with no uncovering and covering of the objective. Clearly shows the need for a shutter.
The QHY 8 ccd does not need a shutter as do the rest of the sony chips as they are not full frame like the 6303E is.
hmm let's try this again
i don't follow
can you explain what's going on in the picture
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-bill w
nexstar 8 GPS
canon 300D, Toucam Pro II
SXV-H9C, H9, SX Lodestar autoguider, SX-AO, DMK 51
FS 102 (OLV), FS60 CSV, 8" LX200R, Lunt 60/50 double stacked PT B1200, Losmandy G 11, ASA DDM60
http://astro.whwiii.net/
image processing monitor calibrated to just differentiate darkest boxes:
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JanM
scholastic sledgehammer
Reged: 03/07/05
Posts: 754
Loc: Sheffield UK
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Its hard to explain but some ccds' like the sony have inbuilt circuity into which the charge from the pixels can be moved to. A kind of inbuilt electronic shutter. Now this extra circuity will take up pixel space making this type off cdd less sensitive.
Other chips like the kodak full frame series do not have this circuitry so are more sensitive. These chips read out the image row by row. As the bottom row shifts into the readout area the charge from the above rows shifts down until the entire ccd is readout.
Whilst readout is happening pixels are still sensitive to light so continue to record causing the streaking pattern seen above.
So with these ccd's you need to use a shutter infront of the ccd so the pixels cannot record light during readout.
Jan
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ccs_hello
Postmaster
Reged: 07/03/04
Posts: 5224
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SONY interline CCD, by its name, has a separate buried vertical charge transport structure whilst KAF6303E use the same CCD well for both photon sensing and vertical charge-transport thus requires mechanical shutter to stop the incident light during charge-transport read-out phase.
Clear Skies!
ccs_hello
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Southpaw
Carpal Tunnel
Reged: 12/30/03
Posts: 1894
Loc: Knoxville, TN
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Quote:
SONY interline CCD, by its name, has a separate buried vertical charge transport structure whilst KAF6303E use the same CCD well for both photon sensing and vertical charge-transport thus requires mechanical shutter to stop the incident light during charge-transport read-out phase.
Clear Skies!
ccs_hello
Man that just went way over my head. Thanks for the explanation. All I know is I could use one.
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Chad
16" f/4.5 Starfinder
8" f/6 Starfinder
Orion 80ED Moonlite CF1-s
Orion 80mm Guidescope
Meade 114/500 4.5" f/8
Custom Made Harmonic Drive Gear Mount
Canon Rebel XT(unmodified)
ST-7ME
QHY 6302CE CCD
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JanM
scholastic sledgehammer
Reged: 03/07/05
Posts: 754
Loc: Sheffield UK
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Here a shot where i used a peice of black card to act as the shutter.
Taken last night just about 10mins total exposure time. Conditions here in the uk were pretty bad but i was out testing the polarscope for the GM8 i borrowed. Dew covered the objective hence the lack of detail in the center...
Plan to return to this one later on a better night.
Jan
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Southpaw
Carpal Tunnel
Reged: 12/30/03
Posts: 1894
Loc: Knoxville, TN
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Another nice image Jan! I take it you are liking this camera a lot?
I finally got a 2" adapter for mine and tried it out. Looks like it is going to work quite well once I get my autoguiding down.
Keep them coming.
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Chad
16" f/4.5 Starfinder
8" f/6 Starfinder
Orion 80ED Moonlite CF1-s
Orion 80mm Guidescope
Meade 114/500 4.5" f/8
Custom Made Harmonic Drive Gear Mount
Canon Rebel XT(unmodified)
ST-7ME
QHY 6302CE CCD
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c131frdave
Post Laureate
Reged: 01/17/05
Posts: 4376
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My camera has a Sony CCD with no shutter. It has a QE of between 55% and 65%. I don't get the shutter thing either. Perhaps a more layman's explanation?
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Tak NJP
Various sizes and shapes of formed glass
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JanM
scholastic sledgehammer
Reged: 03/07/05
Posts: 754
Loc: Sheffield UK
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Hi Chad,
Yes i do like this camera, for the price there is nothing comparable. I look forward to seeing your images. I dont know if you remeber but we had a chat about the 6302CE and QHY camera via email some time ago. You were very helpful so thanks.
Jan
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ccs_hello
Postmaster
Reged: 07/03/04
Posts: 5224
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Quote:
My camera has a Sony CCD ...
Which one?
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c131frdave
Post Laureate
Reged: 01/17/05
Posts: 4376
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I don't know... Super HAD something or other. SXV-H9 mono.
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Tak NJP
Various sizes and shapes of formed glass
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ccs_hello
Postmaster
Reged: 07/03/04
Posts: 5224
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That's icx285al, progressive scan ExView HAD. This type reads out the whole frame in one shot {and stores such info in (light-shielded) vertical register} thus there is no need to use mechanical shutter.
Earlier descriptions are either on Kodak 6303E or other type of Sony.
Clear Skies!
ccs_hello
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JanM
scholastic sledgehammer
Reged: 03/07/05
Posts: 754
Loc: Sheffield UK
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Some test images taken the same night as the network above... only 12 mins worth in 100 sec subframes...
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RandyD
member
Reged: 06/06/05
Posts: 27
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Guys, just got emailed by Qiu....has web site set up with info. on the QHY8 camera.
http://qhy.lamost.org/QHY8/index.htm
Thanks....
Randy
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nytecam
Postmaster
Reged: 08/20/05
Posts: 9841
Loc: London UK
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Quote:
wow nice now give us that color 
It's H-alpha filtered so it has no colour - except red 
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Nytecam 51N 0.1W
Meade 30cm LX200+C8+Ha+CaK PSTs+spectrographs
SX M9+Lodestar-C CCDs/Canon 300D DSLR
My Meade astrograph-colour deepsky
My supernova discovery
My dome build/spectroscopes/DSO images/Lodestar colour images & videos
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nytecam
Postmaster
Reged: 08/20/05
Posts: 9841
Loc: London UK
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Thanks for the news...that will be the Sony chip then as used by Starlight Xpress - has the standard IR block filter been removed?
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Nytecam 51N 0.1W
Meade 30cm LX200+C8+Ha+CaK PSTs+spectrographs
SX M9+Lodestar-C CCDs/Canon 300D DSLR
My Meade astrograph-colour deepsky
My supernova discovery
My dome build/spectroscopes/DSO images/Lodestar colour images & videos
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Kim Miau
Pooh-Bah
Reged: 07/17/06
Posts: 1261
Loc: Malaysia
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Quote:
Quote:
wow nice now give us that color
It's H-alpha filtered so it has no colour - except red
I would say this camera rocks!
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Robin Lee - Cyclops Optics
Meade 8" LX90
QHY5L-II + IMG0H + QHY8L
Have access to...
Mewlon 300 + EM500
TMB 175 f/8 + Gemini G41
And... bad weather.
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riverpoet
sage
Reged: 11/03/03
Posts: 255
Loc: Slovenia, Europe
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Would this camera perform better in suburban light polluted environment than a modded EOS350D (Rebel XT)?
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C11 + Skywatcher EQ6 Pro + Skyshed POD XL3
Vixen Sphinx NexSXD
Basler Ace 1300-30GM, QHY5, Canon EOS 1000D (mod)
Astrotrac TT320X
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My Astrophoto Gallery
FINDASTRONOMY - Astronomy Search engine
Astronom.si - Slovenian Astro Community
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MMys
member
Reged: 10/02/06
Posts: 11
Loc: Hradec Kralove, Czech republic
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I think so YES. I tested this my new camera yesterday, under very poor conditions, directly from suburban town of 100 thousnad city in Czech Republic, in between of streetlights.
Limiting naked eye magnitude approx. 3.5mag
I combine one 5-minute and one 1-minute exposure with standard processing (Dark, Bias, Flat). Then log. scale and mild color balance and crop in Adobe PS. Newtonian 190mm f/3.7 with Paracorr was used as imaging equipment.
Dynamic range of sensor and 16 bit A/D conversion is enough for "fight" with high level of sky background in image.
Here is the result:
higher resolution cklick here.
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400mm Ultralight Alluminium Dobson
Vixen VC200L f/9 V.I.S.A.C. Cassegrain
Homemade Newton 185/610+Paracorr
Borg 77ED 500mm with f/5.6 and f/4 reducers
Modified EQ6 mount, TVGuider
Modified (DIY) Canon EOS 300D, QHY8 6Mpix color CCD
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