Crater Aristoteles - 6500mm fl in SPX350.

[johnh]

SPX350, F4.53 working at F18.6/6500mm fl with TVx3, EQ6, DMK21AF.

This is the best image taken so far in 5 months of DMK imaging with only above avg seeing through Astronomik red filter, 805/4000 frames stacked with AviStack sharpened with Reg5/imageAnalyser and resized to 800x600 pixels.

Crater Aristoteles is just West of Vallis Alpes.

Thanks JohnH.

[Psychobilly]

Now taht's just a "mental" image - superbly executed...

Peter...

[Sam]

That's stunning John, a really awesome image - very very sharp and tons of detail.

[omneferuss]

Please excuse my curiosity and ignorance, but my arithmatic tells me 350mm aperture and f-ratio of 4.53 with a 3x barlow = 4756-ish ..but I've gathered by osmosis rather than from any explicit statement that these TV's are not ordinary 'Barlows' but 'tele-extenders' or some such, and actually increase focal length by a figure larger than their nominal designation would describe. Is this so?

Very nice shot, by the way!

[johnh]

Thanks guys for looking, and regarding Barlows they have diverging light rays producing a cone like eyepiece projection, the further away you are from the eyepiece position at the top of the Barlow the more fl extension you get my TVx3 was working at 4.1x. There is a Televue power increase graph for their Barlows/Powermates to give the correct increase. JohnH.

[omneferuss]

Thanks JohnH ! I didn't know that! Cheers

[jamesFSO]

very nice indeed !!! ...

JJ

[Doc]

Awesome image detail and at 6500mm FL to boot.

Well done.

[brendant]

Stunning image, the detail is awesome.

Brendan

[ngc2403]

POW from me

POW from narrowbandpaul too!

stunning just stunning

[Beyond_Vision]

Brilliant capture extremely sharp with a fantastic amount of detail showing.

One for the album

Regards

Kevin

[barkis]

It's almost like you could take a stroll down the terraced wall to the crater floor.

It is a very detailed capture.

Great capture John.

Ron.

[neil groves]

why can't I see the image?

Neil.

[Bizibilder]

The thread is from 2009 and it is possible/likely the image has been removed?

[neil groves]

1 minute ago, Bizibilder said:

The thread is from 2009 and it is possible/likely the image has been removed?

ok thanks....

[johnh]

I think they removed my image so here it is.

Regards, John.

[laudropb]

Very nice image. Thanks for reposting.

[FranckiM06]

Very nice image with lot of details.

Franck  

[neil groves]

Thanks for the repost John...gives the impression of orbiting 36,000 feet above the surface....

awesome view.

Neil.

[Pete Presland]

WOW   I wasn't even "online" in April 2009, let alone an SGL member  Thank you reposting your fine image, just think of the changes in astroimaging since then. Autostakkert, REG6, ZWO cameras......

[johnh]

Yes Pete major changes in planetary CCD sensitivity and Winjupos means there is no limit to frame coilection as you can derotate.  Registax wavelets is still the best,  I use Avistack for lunar as it uses hundred of align points.

Also my own processing skills have improved, I would say this image is a little over sharpened but detailed with good seeing.  Pity the seeing does not improve with the technology.

Regards, John.

[Rodd]

Wow--not much over sharpened--I like sharpness.  Amazing pic.  I must tru avi stack--I thing Autostakkard2 works better than Registack for stacking as well.