Re: [pinhole-discussion] Micro or macro photo with pinhole photo

[echiniscus]

> Maybe you're asking something else, like what is the "normal" lens for 
> 6x9 film.  I think it would be the same length as a diagonal from one 
> corner of your film to the other.  So, to calculate that you would take 
> the square root of   (6x6 + 9x9) which is approximately 11cm or 110mm.  
> I think thats right.  

Correct (for 120 film about 115 mm for 6x9, 80 mm for 6x6 and 75 mm for
4.5x6 is the standard.

Be aware: If you take closeups with a pinhole at such long focal length the
unsharpness due to the pinhole size will be much larger than assumed in the
standard formulae used to calculate optimum pinhole size. You should choose a
bit a smaller pinhole (but closeups with pinhole tend to be a bit frustrating
if you are going for sharpness ...)

keep on

martin

-- 
GMX - Die Kommunikationsplattform im Internet.
http://www.gmx.net

Maybe you're asking something else, like what is the "normal" lens for 6x9 film.  I think it would be the same length as a diagonal from one corner of your film to the other.  So, to calculate that you would take the square root of   (6x6 + 9x9) which is approximately 11cm or 110mm.  I think thats right.  ----- Original Message ----- From: luciana napchan To: pinhole-discussion@p at ??????? Sent: Friday, October 26, 2001 9:52 AM Subject: Re: [pinhole-discussion] Micro or macro photo with pinhole photo Thank you for your response  But I did not want a wide angle image, so for instance, if I want to make images of fruits, with a 6X9 120mm film, is my image going to be distorces ? How can I have a normal image for a 120mm film ? I do have a zero 6x9 camera and thinking to built a 4X5 one Thank you so much Luciana   >From: George L Smyth >Reply-To: pinhole-discussion@p at ??????? >To: pinhole-discussion@p at ??????? >Subject: Re: [pinhole-discussion] Micro or macro photo with pinhole photo >Date: Fri, 26 Oct 2001 09:36:25 -0700 (PDT) > > >--- luciana napchan wrote: > > > > I would like to know which camera should I use to make macro or >micro photography with pinhole ? > >It doesn't matter - just place your subject close to the pinhole. > >Cheers - > >george > >===== >Handmade Photographic Images >http://members.home.net/hmpi/ > >__________________________________________________ >Do You Yahoo!? >Make a great connection at Yahoo! Personals. >http://personals.yahoo.com > >_______________________________________________ >Pinhole-Discussion mailing list >Pinhole-Discussion@p at ??????? >unsubscribe or change your account at >http://www.???????/discussion/ Get your FREE download of MSN Explorer at http://explorer.msn.com _______________________________________________ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??????? unsubscribe or change your account at http://www.???????/discussion/