Lens for 4x10, Please Advice.

[c.j._wong2]

Greeting

 

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I am thinking to add a 4x10 camera back to my 5x7 Canham,

some qustions:

 

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1. Which 90mm lens will covers 4x10 ? prefer to have to small

/light weighted if possible.

 

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2. Is it necessary to have 90mm for 4x10 ? would 110 mm be

just fine, especially 110mm seems a good choice for 5x7

format ...

 

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3. I understand people cut 8x10 film to fit 4x10. Intend to do the

same, I am wondering that, after you split a sheet 8x10, there

will be one sheet 4x10 has code notch and the other doesn't.

How do you do to indentify emulsion side with that non notch

film ?

 

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Thanks in advance for all advices, greatly appreciated.

[bj_rn_nilsson]

You'll need at least 275 mm of image circle, as that is the diagonal

of 4X10".

 

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As most 90mm wideangles only covers around 220-240 mm, they will not

do. Not even the Schneider Super Angulon XL 90 will do, as it has

259mm image circle at f/22.

 

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The Symmar XL 110 will work though, even though without any

substancial movements. (The image circle for the 110XL at f/22 is 288

mm.)

 

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When cutting the film, you can cut a 1/4" from the corner (the top

right hand one), so that you know up from down in the future, unless

you load the film holders at the same time. Just make sure that you

find and dispose of the cut-offs, so that they later don't end up on

top of the film in the filmholder. Those little scrap pieces tend to

end up whereever they're not supposed to.

[jason_greenberg_motamedi]

With 'panoramic' cameras I have always prefered to use what would be the

standard lens with 'ideal' format for the 'height' of the camera. So, a 4x10 has

a height of 4", and an 'ideal' format would be 4x5, with standard lens of

150mm (6x17 would be ~90 mm). I think a 90 or even 110 mm would be really

wide. My suggestion would be a 150 mm Super-Symmar, or on budget try a 6

1/2" WA Dagor (what I use). I find 165mm Super Angulons too big and too

expensive, and I don't think a 165mm Angulon will cover.

[dan_smith]

From personal experience shooting the Canham 4x10, the Schneider 90XL

covers it. At least the one I was shooting did so with no vignetting

in the corners.

[stephen_longmire]

Haven't used it myself, but I understood a few years ago (from

Patrick Alt, who made a lovely camera at this size) that Ilford was

coating at least one of their b&w films in 4x10, though I haven't

seen it distributed in this country. Robert White, the British

dealear, ought to know. When cutting down film, remember to measure

the actual size of the film, which is generally 1/8" shy of its

reported dimension in each direction (so it fits in the film holder).

Naturally, you want to replicate this scenario with the two halves.

[wayne_firth3]

I use this format and know that a 90mm f/8 SA will definitely not

cover the format. My widest lens that I use on the format is the

121mm f/8 SA which is very wide. It can be very impressive for some

shots but I find that I agree with the idea of using a lens that is

closer to "normal." I really like shooting 4x10 with a 240mm G-Claron

which gives a nice perspective and is small in size. Remember that

panoramic does not mean you have to use the widest lens available. I

have a Canham 4x10 but because I use it for landscapes I find the

movements are not important enough to justify dealing with the Canham

so I prefer to use my homemade 4x10 camera which is light and compact

enough to be hand-held if necessary. As for film, I cut 8x10 Tri-X. I

use a hole punch with a stop so that it only nips the film a bit. I

do this over the floor rather than the table. So far none of these

crumbs have found their way into the film holders.

[stevewillard]

I have just bought a 4x10 back for my Wisner camera. To my

pleasant surprise, many of my Nikkor lenses which are rated for

either 4x5, or 5x7 cover my 4x10 back with room to spare.

 

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Here are the lenses I am using with my 4x10 back: 90mm f8 SW,

120mm SW, 180mm W, 210mm W, 300mm f9 M, 360mm T,

500mm T, and 720mm. All of these lenses cover the 4x10 with

wide open apertures. Many of them should not be capable of

covering the 4x10 according to their specs. I bought the 150 f8

SW fro the 4x10, but it was so big in diameter it would not fit

through the 4x4 opening of my front standard. To my surprise I

did not need it.