Jupiter DSLR

bluescope · #1 18-05-2007, 12:45 AM

This effort rather pales into insignifcance after seeing Mike's latest offering but here it is anyway. Taken last night ..... 15 selected frames stacked in Registax 4 ... adjusted in PS.

Ingo · #2 18-05-2007, 02:03 AM

Not bad for a DSLR. Looks very good for 15 frames.

It seems to me that if I got a wide eyehole eyepiece, I could do a very good job with a reversal mount and a kit lens set at wide open aperture.

Reversal will give me enough so the image will be sharp when pointing the back of the lens into the eyehole of the eyepiece.

With tracking you could get ISO100 or 200 and have very low noise, and very high resolution.

bluescope · #3 18-05-2007, 02:27 AM

These shots were taken with 350D through 20mm LV Vixen eyepiece with Meade Variable projection adapter and a 2x SW barlow ..... 0.8sec @ iso100 .... I took around 200 frames all together and picked best from one batch to process with registax. I made new layer of each image and overlayed them in PS to bring out detail then stacked then did a little more levels adjustment after stacking.

Ingo · #4 18-05-2007, 09:26 AM

Quote:

Originally Posted by bluescope

These shots were taken with 350D through 20mm LV Vixen eyepiece with Meade Variable projection adapter and a 2x SW barlow ..... 0.8sec @ iso100 .... I took around 200 frames all together and picked best from one batch to process with registax. I made new layer of each image and overlayed them in PS to bring out detail then stacked then did a little more levels adjustment after stacking.

I had to push the scope to get Jupiter back into the side of the frame every 10 or so frames. I got about 60 good ones and processed them in registax, but my scope sucks so I could only get tiny pics of it.

iceman (Mike) · #5 18-05-2007, 09:44 AM

Nice image Steve.

I still affirm that a webcam will give you better images than a DSLR, due to the long exposure time you're using.

Check out this post by Paul which has more explanations.

Ingo · #6 18-05-2007, 12:36 PM

Well see iceman, I have a Canon 1D Mark III on pre-order. I believe the noise on that even with say ISO800 will be minimal due to the Digic III processing chip. 10FPS at 10.1MP, with ISO800 will bring it up to say 1/40 to 1/100. Plenty fast.

ISO800 would be very clean. ISO1600 on the 1D Mark IIn's is very very clean.

I'd like to see the 5D using ISO1600 shooting through and eyepiece.

I don't think the webcam thing applies versus a high end professional DSLR such as the 1D Mark III in noise control.

As you can see, moon pictures are very sharp from DSLRs, a hell of a lot sharper in single frames, with higher resolution. A webcam would need a bunch of frames stacked to equal the sharpness of a single DSLR frame.

bluescope · #7 18-05-2007, 02:01 PM

Mike
I think your planetary images are great .... I just haven't got to grips with webcam imaging at this stage .... it's just easier and less time consuming for me to shoot with my 350D. I tried doing a webcam image of Jupiter the night prior to doing this one and what I got was a very blurred, no detail blob. I would be the first to declare my joy at having a beautiful webcam shot of Jupiter full of colour and festoons etc but it seems that is not to be at this time.

Quote:

Originally Posted by iceman

Nice image Steve.

I still affirm that a webcam will give you better images than a DSLR, due to the long exposure time you're using.

Check out this post by Paul which has more explanations.