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Re: NPF Rule instead of the 600 Rules

Posted: 27 Jun 2015, 09:30
by djoubert
Hi,
Thank you again for your attention to improve this great application.
About the result for the npf calculation, the value is close of the value I use, ( 20s with a 6D full frame , 2.8 apperture, 14mm focal lenth )
nevertheless when checking from the npf detailled rule I dont get the same result.
I tried to understand from the link you provide above, but did not find the rule you applied.
Could you provide within this post the exact rule you implemented ?
Thank you very much
Dominique

Re: NPF Rule instead of the 600 Rules

Posted: 16 Nov 2015, 10:09
by fred_76
Hi!

I'm the author of the NPF rule. The link to the page with all details on the calculation and an online calculation tool is here :

http://www.sahavre.fr/tutoriels/astroph ... -d-etoiles

It is in french but Google should translate it quite easily for you.

The online tool uses the full NPF rule and not the simplified rule. It takes into account the elevation of the portion of sky you want to shoot. No need to use exact values, just use your hand with fingers wide opened to measure the elevation above horizon and indicate the approximate direction (North, South...). The result will be given in 9 portions of the photoframe so that you may focus on the right area of your composition.

The online tools already has the data of most DSLRs and digital backs (340 listed from 15 brands). I will try to keep it up to date at least once a year.

Clear sky

Fred

Re: NPF Rule instead of the 600 Rules

Posted: 16 Nov 2015, 13:22
by aaronpriest
fred_76 wrote:Hi!

I'm the author of the NPF rule. The link to the page with all details on the calculation and an online calculation tool is here :

http://www.sahavre.fr/tutoriels/astroph ... -d-etoiles

It is in french but Google should translate it quite easily for you.

The online tool uses the full NPF rule and not the simplified rule. It takes into account the elevation of the portion of sky you want to shoot. No need to use exact values, just use your hand with fingers wide opened to measure the elevation above horizon and indicate the approximate direction (North, South...). The result will be given in 9 portions of the photoframe so that you may focus on the right area of your composition.

The online tools already has the data of most DSLRs and digital backs (340 listed from 15 brands). I will try to keep it up to date at least once a year.

Clear sky

Fred
Thank you very much Fred!

Re: NPF Rule instead of the 600 Rules

Posted: 08 Apr 2016, 10:46
by fred_76
Hy, I updated the page, now 406 DSLRs and digital backs, from 19 brands.

All the best !

Fred