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7mm Shootout in the works

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132 replies to this topic

#126 luxo II

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Posted Today, 05:22 AM

Simon I have SSWs and quite like them particulary for high contrast and sharpess, though my scope at f/13 isn’t going to challenge them.

I’ve just ordered APM 10, 15 and 24 UFF on a whim, and might have a go with an ultramonocentric - 10mm is pretty awesome on the planets (331X). When these arrive I’ll comoare with my lot and the second raters will go out of the box.

Edited by luxo II, Today, 05:24 AM.

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#127 russell23

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Posted Today, 10:33 AM

Hiw does your 10mm with the 1.6x, compare?

I like the 10mm with 1.6x better than all of the 7mm options for lunar observations.  It does give more magnification (129x for 7mm vs. 144x for 10mm w/1.6x barlow in the 120ED) so it is not a perfect comparison.  I have not tried the 7mm eyepieces with the 1.6x barlow yet because seeing so rarely supports the resulting magnification around here.  Last fall I did do some lunar observations with the 6.5mm Morpheus and the 1.6x barlow and thought it was excellent.


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#128 Kutno

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Posted Today, 11:39 AM

 

For Luna observations:

 

#1:  7mm Nikon

#2:  7mm DeLite

 

Here the difference is based upon two factors:  (1) How etched and how much pop do lunar features have and (2) how contrasty the light is across the lunar surface. 

 

The 7mm Nikon and the 7mm DeLite are very close here.  

 

And the DeLIte costs about 20% less than the Nikon.  


Edited by Kutno, Today, 11:42 AM.


#129 Headshot

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Posted Today, 12:04 PM

The DeLite also has a smaller field of view than the Nikon.



#130 russell23

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Posted Today, 01:44 PM

And the DeLIte costs about 20% less than the Nikon.  

I’m not factoring cost into performance ratings.  However, they are close enough that if the cost difference matters just go with the DeLite.  


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#131 Kutno

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Posted Today, 01:53 PM

The DeLite also has a smaller field of view than the Nikon.

 

No problem!  Planetary enthusiasts have been preaching to us for years, here, how the 43 degrees AFOV offered by your typical ortho is no impediment to better viewing of planets and Luna. 



#132 25585

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Posted Today, 02:45 PM

No problem!  Planetary enthusiasts have been preaching to us for years, here, how the 43 degrees AFOV offered by your typical ortho is no impediment to better viewing of planets and Luna. 

That depends on method of tracking. For manual a wide FoV is needed, wider the better!



#133 Jaimo!

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Posted Today, 02:47 PM

Every planet I have observed has fit into 43 AFOV, except for one.

 

Jaimo!


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