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What is causing this noise?

Started Apr 30, 2019 | Questions thread
jvc1 Senior Member • Posts: 2,202
Re: What is causing this noise?

Jeffry7 wrote:

jvc1 wrote:

The crop looks way over exposed. What lens? Looks like a cheap mirror lens. What's the full image look like? The area of deep space should be all black, the moon should be very bright. SS looks to slow, something's wrong with the whole thing. Can you attach the full image with exif?

Hi jvc1,

It is a cheap lens, but not a mirror. It is one of these:

https://www.celestron.com/products/travel-scope-70-portable-telescope

Which is to say a cheap telescope. Behind the telescope lens I have a t-mount 2x teleconverter.

This is a daytime shot. It was taken at 8am. The background is the correct color because the sky is blue during the day. I explained it was a daytime shot in the OP. Not sure how to make it plainer.

I will try to post the full with exif, but that is around a 100mb Tiff, and DPReview seems to be choking on it.

Sorry, I missed that it was a daytime shot. Mirror lenses and cheap telescopes produce images with a low level of contrast. I have a cheap 4" mirror telescope so I speak from experience. Upping the contrast in post can help a lot but it's tough to get great photos from cheap equipment. I'm glad you figured out the noise problem. I'm curios to see the image without the noise if you can manage it sometime.

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https://www.flickr.com/photos/129958940@N03/

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