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Davey-T

Which scope for NB ?

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Posted (edited)

Just been admiring Ivos image of Jones Emberson 1 taken with Tak 130 and thinking if I used my 152mm, doublet instead of the present 110 triplet would the extra aperture override the better optics given it will only be for NB.

Dave

Edited by Davey-T

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On 5/9/2018 at 14:07, Davey-T said:

Just been admiring Ivos image of Jones Emberson 1 taken with Tak 130 and thinking if I used my 152mm, doublet instead of the present 110 triplet would the extra aperture override the better optics given it will only be for NB.

Dave

In my opinion only experiment will decide this.

Olly

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27 minutes ago, ollypenrice said:

In my opinion only experiment will decide this.

Olly

Unfortunately we don't get a lot of clear skies to experiment with here :grin:

Dave

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I'm with Olly on this. You certainly have a whole arsenal to experiment with.

I think you'd be hard pressed to tell the difference. I used ED80s with some success at 1.8 arcsec/pixel. I print 6000*4800 after a PS enlargement and they look great. Well, to me at least.

Aperture is great for max theoretical resolution if you have seeing and a camera to match, but f-ratio makes for quicker exposures of course. You're comparing 5.9 vs 7 native? Fairly similar, insofar as conditions on the night will have bigger influence.

NB is great for big structures of course so I'd go for max FOV. (Which is what I'm working on myself at the expense of resolution)

/Jesper

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