A Real Bottle Bottom Lens

That's pretty cool! Why didn't they start with clear glass though!? Might reduce that colour cast issue.
 
Making your own lens? What will they think of next, developing your own negatives? ;)

Anyway...

Abbaz, I like that little 'I use film' image. Do you have a bigger, better quality copy of it? And would I be allowed to use it?

Regards,

Ronald
 
itf said:
Why didn't they start with clear glass though!? Might reduce that colour cast issue.
Click to expand...

I guess it would be easier to buy a plano-convex from Edmund optics.

Ronald_H said:
Abbaz, I like that little 'I use film' image. Do you have a bigger, better quality copy of it? And would I be allowed to use it?
Click to expand...

The "I use film" ribbon is not mine. It has been released in the public domain by its creator, the photographer Peter Robinson:
http://www.monopix.co.uk/ribbon.shtml

Cheers!

Abbazz
 
texts in the link remind me engineering student humor here, so I would not think too hard why they didnt use clear glass. probably they got the idea right after emptying that beer bottle :)
 
Finnish! ... and I started to think that there are English words that I have not yet learned. It's a cool idea with a mediocre result.
 
That is a pretty cool project, I also wish I could read the writeup. Sadly I speak only English and enough German to make a fool of myself.
Making optics, at least designs with a very small number of surfaces is one of the few places where a dedicated home craftsman can compete with the best manufacturers in the world. So although the results aren't that great in this case, I don't think that matters all that much to the person who spent so much time and effort to prove the idea.
The builder chose an awful piece of glass to start with and knew exactly how bad the results would be before starting out. My hat is off to him.
I'd like to know, is the lens actually plano-convex or maybe a positive meniscus like early box cameras used? It appears to be plano convex in the ray trace software screenshot, but it seems like it would be better to use the existing shape of the glass as well as producing a better image.
 
Bryce said:
That is a pretty cool project, I also wish I could read the writeup. Sadly I speak only English and enough German to make a fool of myself.
Making optics, at least designs with a very small number of surfaces is one of the few places where a dedicated home craftsman can compete with the best manufacturers in the world. So although the results aren't that great in this case, I don't think that matters all that much to the person who spent so much time and effort to prove the idea.
The builder chose an awful piece of glass to start with and knew exactly how bad the results would be before starting out. My hat is off to him.
I'd like to know, is the lens actually plano-convex or maybe a positive meniscus like early box cameras used? It appears to be plano convex in the ray trace software screenshot, but it seems like it would be better to use the existing shape of the glass as well as producing a better image.
Click to expand...


Bryce,

You got me here; I have no clue at all what plano-convex or meniscus mean, but you seem to know what you are talking about. I know more about statistical process control and about the Baghdad society and Iraqi social make-up.
 
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