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Old 04-08-2017, 01:28 PM
glend (Glen)
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Your Focal Length Spread?

In another thread, PW set out his telescopes by focal length, covering a pretty wide range, and providing wide field to narrow field imaging. Here is what Peter shared:

"So in order of focal length my current ensemble is: FSQ85, FSQ106, AP130GTX, AP155, AP RH 305, Alluna RC16. They all bring something different." My apologies Peter if you din't want this mentioned here just let me know and i will delete it.

Just curious as to how others setup their equipment assets to achieve a range of focal length capabilities, and what drives the decision, other than a desire for a choice of field size and magnitude to suit?

Last edited by glend; 04-08-2017 at 01:41 PM.
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Old 04-08-2017, 01:49 PM
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Marke (Mark)
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80 , 102 , 250 plus minus 0.67 focal reducer. Then look up object in either SkyX or CCDcalc and compare the projected fov with the object size and use what best fits.
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Old 04-08-2017, 06:01 PM
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Peter Ward
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Quote:
Originally Posted by glend View Post
In another thread, PW set out his telescopes by focal length, covering a pretty wide range, and providing wide field to narrow field imaging. Here is what Peter shared:

"So in order of focal length my current ensemble is: FSQ85, FSQ106, AP130GTX, AP155, AP RH 305, Alluna RC16. They all bring something different." My apologies Peter if you din't want this mentioned here just let me know and i will delete it.

Just curious as to how others setup their equipment assets to achieve a range of focal length capabilities, and what drives the decision, other than a desire for a choice of field size and magnitude to suit?
...infamy!

Actually when I include camera lenses and barlows the range goes from 4.5mm to about 13.2 metres.... one has to be versatile
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