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Kyuss

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Posts posted by Kyuss

  1. 8 hours ago, Adam J said:

     

    He is actually wrong it's not pinched, pinching will show that effect across the entire frame including the centre of the field. It's actually a sign that the corrector design is not working well at full frame.

    It's a common effect in the corners of large sensors as the reducer effectiveness breaks down. I can't find a spot diagram for this scope. However for example this is a Askar scope. 

    Note the bottom right star 22mm spot shapes, when pixel sampled this ends up looking like a cross. 

    image.png.a743e62764255f07c80bfdf5a05511bb.png

    I see your point!!! Seems to fit the case in the video.

  2. 10 hours ago, Elp said:

    The thing with pinched optics, when people mention them they don't go into it further as it could be attributed to a number of things. I believe the new Askar triplets can suffer from it, it's temperature related and you have to wait for thermal equilibrium, some people have used dew heaters further past the objective to heat the internal mounted lenses.

    But do you really want all that trouble with your newly acquired scope? Not to mention that pinched optics can be a design flaw also.

  3. 6 minutes ago, Richard_ said:

    Welcome Panos, sounds like we have at least one thing in common 😂

    Bortle 9 sky can do that to you...you understand :) 

  4. I am Panos and a recent addition to this forum. I live in Greece and primarily enjoy swearing while imaging under the bottle 9 sky of Athens. Looking forward to explore all the info here 😀 

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