Its been done, cardboard lenses: http://www.photocritic.org/2005/macro-p ... -a-budget/
is a good example of a macro lens, but when i woke up this morning I wanted telephoto, like the nice 300-800mm sigma. Well after a trip to the dollar store I bought a really big magnifying glass and started messing around a bit. Grabbed my cardboard tube and cut it up taped my glass on and viola! I have some samples here (down below).
But first lets talk about it. It got a little scratched and dusty but what can you do? (not scratch it of course) I went outside anyway. the first few were less than spectacular but then I took a couple photos and my first thought was simply, "Tilt-shift" lenses like the lens baby.
The lens adds a little magnifications while simultaneously offering wider angle capabilities and a cool blurring effect even at f/8 (due to shape of the glass) So for 3 usd you to could have your very own diy dollar store magnifying wide angle tilt shift lens or DDSMWATSL, if you get some free time I really recommend making your own lens. I don't see this as practical but it is a neat effect. and I've been calling it a lens for me as I mentioned above, its more of an adapter, that goes on the lens so converter maybe being the right word?
and now, without further a-doo I present to you the Jake "A" Series (insert focal length here) wide-magni converter. (The a stands for affordable or maybe adorable)
First we have one of the first photos, a hatchet that i left out all winter to rust.
Next the two images that made me think tilt-shift:
and I really like the next 3, especially the 3rd one the bokeh isn't great not that smooth creamy but is a nice effect.
I'll have a picture or two of the lens(converter) in about 20 minutes