Re: [APML] A few Canon 10D shots from this past new moon

[John Laborde <jlaborde@ix.netcom.com>]

Hi Wei-Hao,

A device to move a camera one frame over is not a bad idea. This would 
have to be calibrated to move the camera the correct amount for a given 
lens. I usually make all my own devices so I will have to give this some 
consideration. Thanks for the idea.

As far as noise in the image goes, this may be due to the resampling of 
the original mosaic which is a tiff file 6750 x 9350 pixels and 184 
megabytes to a 1000 x 1400 pixel  highly compressed jpg and only 280 
kbytes. The original tiff actually looks real good.

John

Wei-Hao Wang wrote:

>Hi John,
>
>Nice shots.  Your Rho Oph mosaic caught me eyes.  I believe
>mosaic with DSLRs could be a very powerful way to produce
>wide-field images.  Indeed, Japanese astrophotographers are
>now regularly producing mosaic images with DSLRs.  Some
>Japanese telescope retailers are selling focal plane mosaic 
>devices for DSLRs.  With these devices, one can easily make
>2x2 mosaics by shifting the camera in the focal plane without
>changing the telescope pointing and without changing the guide 
>star.  Vignetting correction and distortion correction also become 
>easier or even unnecessary.
>
>I feel that your lens shots are noisier than the FSQ106 shots.
>Is there a reason?
>
>Cheers,
>
>Wei-Hao
>
>  
>


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