A new line of Chinese pictorial lenses!

[EuroPhoto]

Mark, the last one is very beautiful and intense!
And what a great idea with the loupes )

[Adamphotoman]

Back in 1990 give or take a few years I tried this on 4X5.
I had Schneider put a barrel 305 Claron G into a shutter so I had the barrel left over. I epoxied the barrel to a self cocking MP4 shutter and used 58mm Bronica closeup lenses.
All on a discarded Sinar lens board.

Looked pretty ugly but worked quite well. Gave me a variable aperture and a flash sync and shutter speeds.

Fun stuff Mark. Wish I had a teach like you.

[asmariglia]

i got a magnifying glass 75mm and just finished my first lens... it's 260mm f3,5 and now i was looking for the distance between the lens and the shutter to put in front of it. I can't find any formula about and for what i can read on the primitive photography book there are only recommendations to maintain a certain distance from the lens element ... something between 1/6 to 1/7 of the focal length. Maybe a 40mm distance ?

[Tim Meisburger]

I don't think there is any particular distance for the shutter. As close as possible is fine. Are you thinking of the aperture? If so, there are standards for placing it between two lenses, but for something like that I don't think it matters. I stopped down a magnifying glass by taping a piece of black plastic from a film bag to the glass frame, with an appropriate size hole for f/8 that I cut with the little knife on my keychain. Worked fine.

FWIW, I like f/8 with magnifying glass lenses. Gives a (in relative terms) and large sharp centre with a defocused frame.

[asmariglia]

hi tim and thanks, if so it's ok, i got a shutter from a pasta measurer with 2 different apertures f5,6 and f11, i can try to make another one of f8 like you said... maybe it works better and looks more pro =)
at the end I maintained the distance of 40mm for my convenience and now I just have to try it together with a film

[Tim Meisburger]

Great. I look forward to seeing your work!

Technically, in English that is not called a shutter, it is a lens diaphragm (a machine for changing hole size), and used to control the size of the aperture (aperture just means hole). A shutter is the machine that rapidly opens and closes the aperture, and that you click to take your picture.

That is a nice diaphragm!

[jp]

Aesthetically better than my Pipe & Spaghetti (P&S) lens. Look forward to the shooting results.

[stiganas]

I got a (stupid) question:

this magnifying glasses are symmetrical or they have an orientation and a proper way to use as lens ?

[Mark Sawyer]

Nearly all common round magnifying glasses are symmetrical convex lenses, so it doesn't matter which side faces the subject. Hope this helps!

[plaubel]

i was looking for the distance between the lens and the shutter to put in front of it. I can't find any formula about

M. Neumüller said anno 1940 : nearly 10 percent of the focal length, if my memory is right.
I can search the formula in his book "Practice of using softfocus", if needed...

Cheers,
Ritchie