[ATM] Rough 360 linear resolution or 300lp/mm

["Miguel" <emiliarodriguez@bellsouth.net>]

Hello All,

Thanks in advance for replies. I am at a critical junction in rough grinding. Have 20.5 inch and I am at .215 sagitta. I do a comparison at stellafane.com and only diff between f5 and f6 is linear resolution. 300 vs. 360lp/mm for the faster f5. Which is best for detailed views. Don't care about height of scope.

I recall being at Jonathon Dickenson Park (West Palm Beach) w/ the local astronomy club and guy next to me w/ 18" custom was perplexed by the fact that his bigger 18" appeared to look same magnification as my 13" inch custom, w/ the same eyepiece. I was surprised. Same focal length both scopes also I think. Of course I was maxed out and I believe he had juice to spare.  I compared the two at stellafane and based on 4.6 focal ratio both had the same linear resolution although angular was .25 arcsec vs. .344 for the 13".

Which would be best for cranking in the high mag detail? 300lp/mm @ f6 or the 360lp/mm @f5? Hope it is not a dumb issue...just don't know. Thanks all.

Migz
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