ASTRO: A taste of things to come

here is a first light test of a 39 megapixel monochrome PL39000 camera. I
has an engineering grade sensor with bad column defects but OK otherwise.

I got 7 x 10 minutes of Halpha before the clouds moved in.

I am providing links to two full rez images: one taken using the Pentax
400mm f/4 EDIF lens with the ML8300. The other is from the AP155EDF f/7 with
the 4" flattener used with the PL39000M. Both are filtered with Ha filters.

the camera lens image was 2 hours at f/4 and the 39MP was 1 hour 10 minutes
at f/7. I need at least 4-5 hours to make this reasonably smooth

the two systems have roughly the same FOV but obviously the AP/39P combo is
much higher resolution. The KAF39000M has non-microlensed 6.8x6.8 micron
pixels and about 23% QE at Halpha wavelength

P400, ML8300
http://www.narrowbandimaging.com/ima...00_ha_view.jpg


AP155EDF f/7, PL39000M
http://www.narrowbandimaging.com/ima...Ha_7x10min.jpg

Both images are at full resolution. The 39MP image was cropped in the X
direction because my 50x50 filters are too small. The sensor is 36.8 x 49mm.
The KAF16803 is 36.8 square by comparison.

Here is a quickie characterization of the camera:

http://www.narrowbandimaging.com/ima...c_pl39000M.pdf


The elongation in the stars of the 39MP images is due to a polar alignment
problem. The scope is settling into the dirt where I recently set it up a
week before.

Richard Crisp wrote:
here is a first light test of a 39 megapixel monochrome PL39000 camera. I
has an engineering grade sensor with bad column defects but OK otherwise.

I got 7 x 10 minutes of Halpha before the clouds moved in.

I am providing links to two full rez images: one taken using the Pentax
400mm f/4 EDIF lens with the ML8300. The other is from the AP155EDF f/7 with
the 4" flattener used with the PL39000M. Both are filtered with Ha filters.

the camera lens image was 2 hours at f/4 and the 39MP was 1 hour 10 minutes
at f/7. I need at least 4-5 hours to make this reasonably smooth

the two systems have roughly the same FOV but obviously the AP/39P combo is
much higher resolution. The KAF39000M has non-microlensed 6.8x6.8 micron
pixels and about 23% QE at Halpha wavelength

P400, ML8300
http://www.narrowbandimaging.com/ima...00_ha_view.jpg


AP155EDF f/7, PL39000M
http://www.narrowbandimaging.com/ima...Ha_7x10min.jpg

Both images are at full resolution. The 39MP image was cropped in the X
direction because my 50x50 filters are too small. The sensor is 36.8 x 49mm.
The KAF16803 is 36.8 square by comparison.

Here is a quickie characterization of the camera:

http://www.narrowbandimaging.com/ima...c_pl39000M.pdf


The elongation in the stars of the 39MP images is due to a polar alignment
problem. The scope is settling into the dirt where I recently set it up a
week before.



I thought 32% at Halpha was bad with the 11K. Some of that may be the
microlens. Chip is too big for my system. The baffle tube is about
42mm in diameter so the corners of the 11K are somewhat vignetted.
Flats can handle it but couldn't come close with that chip. Even the
16803 would likely be too big at 52mm corner to corner.

Is the 39000 electrically divided into halves for readout with two A/D
converters? I didn't follow the reason for right and left half stats.

Rick

--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

"Rick Johnson" wrote in message
. com...
Richard Crisp wrote:
here is a first light test of a 39 megapixel monochrome PL39000 camera. I
has an engineering grade sensor with bad column defects but OK otherwise.

I got 7 x 10 minutes of Halpha before the clouds moved in.

I am providing links to two full rez images: one taken using the Pentax
400mm f/4 EDIF lens with the ML8300. The other is from the AP155EDF f/7
with the 4" flattener used with the PL39000M. Both are filtered with Ha
filters.

the camera lens image was 2 hours at f/4 and the 39MP was 1 hour 10
minutes at f/7. I need at least 4-5 hours to make this reasonably smooth

the two systems have roughly the same FOV but obviously the AP/39P combo
is much higher resolution. The KAF39000M has non-microlensed 6.8x6.8
micron pixels and about 23% QE at Halpha wavelength

P400, ML8300
http://www.narrowbandimaging.com/ima...00_ha_view.jpg


AP155EDF f/7, PL39000M
http://www.narrowbandimaging.com/ima...Ha_7x10min.jpg

Both images are at full resolution. The 39MP image was cropped in the X
direction because my 50x50 filters are too small. The sensor is 36.8 x
49mm. The KAF16803 is 36.8 square by comparison.

Here is a quickie characterization of the camera:

http://www.narrowbandimaging.com/ima...c_pl39000M.pdf


The elongation in the stars of the 39MP images is due to a polar
alignment problem. The scope is settling into the dirt where I recently
set it up a week before.

I thought 32% at Halpha was bad with the 11K. Some of that may be the
microlens. Chip is too big for my system. The baffle tube is about 42mm
in diameter so the corners of the 11K are somewhat vignetted. Flats can
handle it but couldn't come close with that chip. Even the 16803 would
likely be too big at 52mm corner to corner.

Is the 39000 electrically divided into halves for readout with two A/D
converters? I didn't follow the reason for right and left half stats.


Yes, it has two output circuits and the thing is clocked out in a right and
left side in parallel. That's the only way you can use this chip

the bias seems more stable than the first one because the seams seem to
reliabily disappear after calibration

that early one I had in the early part of 2009 had a bit of instability at
times and you would have to fiddle a bit to avoid the seam showing

Richard,

amazing scale on the ML8300 image, the nebula looks so big that at first I
thought you might have mixed up the pictures.

Stefan

"Richard Crisp" schrieb im Newsbeitrag
m...
here is a first light test of a 39 megapixel monochrome PL39000 camera. I
has an engineering grade sensor with bad column defects but OK otherwise.

I got 7 x 10 minutes of Halpha before the clouds moved in.

I am providing links to two full rez images: one taken using the Pentax
400mm f/4 EDIF lens with the ML8300. The other is from the AP155EDF f/7
with the 4" flattener used with the PL39000M. Both are filtered with Ha
filters.

the camera lens image was 2 hours at f/4 and the 39MP was 1 hour 10
minutes at f/7. I need at least 4-5 hours to make this reasonably smooth

the two systems have roughly the same FOV but obviously the AP/39P combo
is much higher resolution. The KAF39000M has non-microlensed 6.8x6.8
micron pixels and about 23% QE at Halpha wavelength

P400, ML8300
http://www.narrowbandimaging.com/ima...00_ha_view.jpg


AP155EDF f/7, PL39000M
http://www.narrowbandimaging.com/ima...Ha_7x10min.jpg

Both images are at full resolution. The 39MP image was cropped in the X
direction because my 50x50 filters are too small. The sensor is 36.8 x
49mm. The KAF16803 is 36.8 square by comparison.

Here is a quickie characterization of the camera:

http://www.narrowbandimaging.com/ima...c_pl39000M.pdf


The elongation in the stars of the 39MP images is due to a polar alignment
problem. The scope is settling into the dirt where I recently set it up a
week before.