Vignetting/Gradients: Bad Flats or LP? Please help...

[Baskevo]

James,

I have both the Hotech and the AstroTech field flatteners. I prefer the AstroTech. It gives me a better flatter field than does the Hotech.

Cheers,
JT

Jt, I totally believe you, but here is why I am bummed... It took me a very long time to get the spacing just right with the HoTech to have almost a completely flat field, and it was consistent! I have never had such pinpoint stars to the edges!

And now I have to do it all over again with a new field flattener... so either it will perform the way it is supposed to unlike the HoTech and ES (meaning I don't need the extra 30mm of spacing to achieve 85mm back focus, far above the 55mm), or I will need the same spacing as the ES and HoTech (85mm, don't know why), but I will have to fine tune like I did with my HoTech to get as close as possible... In other words, I will have to spend a night or two fiddling around with it. To make things worse, it is going to be cloudy all the way until the next new moon, so I will have to waste a clear night or two on my least favorite part of this hobby--getting a flat field. lol I thought I was done with this T.T

Look how flat this field is:

Also, the HoTech let me unscrew the front end, so I just had the glass piece that allowed me to screw in to the blue fireball 360 degree manual rotator, which was perfect.

But I wanted to try the AstroTech anyway, so I'm not really that bummed

[JayTee]

Okay,

So a quick question, which will take longer to accomplish: 1) Cleaning the Hotech or, 2) Figuring out the best spacing for the AstroTech?

Whichever one takes longer, don't do that one!

In regards to your image above, even the corners look fantastic!

Cheers,
JT

[UlteriorModem]

Meh regardless he will have to find the right spacing.

[Baskevo]

In regards to your image above, even the corners look fantastic!

Cheers,
JT

I knoowwww and that is not cropped at all T.T I'm so bummed lol

Well I be giving the AstroTech a try, I'm sure I can get corners just as good as good... Wish me luck!

[JayTee]

Luck