How much weight can the Toyo field front standards support?

[wallpaperviking]

I apologise if this has been asked before but I did search and could not find an answer.

So I have the Toyo 810G and am just wondering how heavy a lens the front standard can support? I am interested in trying some fast petzvals and/or fast lenses for the 810 format?

Thanks so much in advance!

[Dan Fromm]

Um, if the lens' focal length isn't too long you should be able to make a crutch that rests on the bed in front of the standard and supports the lens.

[Drew Wiley]

Stability is also related to the focal length, and how far out the bellows is extended. Think torque vectors.

[wallpaperviking]

Thanks for the replies, much appreciated!

Am not looking to add anything for support, just wondering how much weight the front standard can hold by itself? Would be looking in the normal to slight telephoto range for 810 (300mm - 450mm).

Thanks! :)

[Mark Sampson]

The Toyo G series (monorails) are sturdy professional-grade cameras. I'm sure that they were designed to hold the common modern lenses for 8x10, even though I've never used one of those cameras.
Huge brass portrait lenses, enormous long process-type lenses, well, you'd have to test those.

[gypsydog]

Which camera are you asking about? Your title asks about a Toyo field which would be an M series, then you mention owning a G series which is not a field camera.

[wallpaperviking]

Which camera are you asking about? Your title asks about a Toyo field which would be an M series, then you mention owning a G series which is not a field camera.

Hmmm, not sure how I included that...

Am talking about the 810 G series..

Thanks! :)

[Vaughan]

The front standard of a Toyo View 810G is the same as the 45G (and 57G for that matter) it's the same part shared between models. The rear standard and bellows (and for completeness, the rail tripod mount) are the only parts that are different between formats.

The front standard has axis tilt, and looking that the design the centre of the shutter should be about right on the axis so stability will be only be limited by the rigidity of the vertical uprights... IOW a lot. The worst case would be using a big lens on a top-hat lens board, particularly a telephoto like the Nikkor T ED 600/800/1200mm.

[wallpaperviking]

The front standard of a Toyo View 810G is the same as the 45G (and 57G for that matter) it's the same part shared between models. The rear standard and bellows (and for completeness, the rail tripod mount) that are different between formats.

The front standard has axis tilt, and looking that the design the centre of the shutter should be about right on the axis so stability will be only be limited by the rigidity of the vertical uprights... IOW a lot. The worst case would be using a big lens on a top-hat lens board, particularly a telephoto like the Nikkor T ED 600/800/1200mm.

Awesome! Thanks for the answer, much appreciated!

What about some of the fast, older petzval type lenses out there... Those suckers look huge!?

If too big for your standard monorail cameras, what are the more sturdy options out there?

Thanks! :)

[Vaughan]

If using a monorail camera, you could get creative with an intermediate standard, some cardboard and a bit of duct tape to use as a support for the front of a long or heavy lens.

[Vaughan]

I have a Toyo 45G and did some testing with a Nikkor T ED 360/500/720mm lens that was mounted in a Linhof Technika board, itself mounted in a Toyo-to-Linhof adaptor.

Test procure: grab the lens and apply force to it.

Results: there were two places of movement. The first was in the tripod head, particularly the quick release plate. The second was the Linhof board moving in the adaptor. Both of these occurred only when significant force was applied. There was no movement in the standard itself nor any flexing of the rail (the rail being the short base rail with one short extension attached).

[wallpaperviking]

If using a monorail camera, you could get creative with an intermediate standard, some cardboard and a bit of duct tape to use as a support for the front of a long or heavy lens.

Good One! That is actually a good idea, using a modified extra standard for support... :)

[B.S.Kumar]

Toyo standards are very strong, and I don't think you'll face any problem. It would be better to mount heavy lenses on regular Toyo boards, not on adapter boards.
You don't need to modify the standard. An intermediate standard can be fitted with another lens board with a hole slightly larger than the diameter of the lens. Make the lens rest on the bottom of the hole. To avoid scratches on the barrel, the hole can be lined with foam or velvet.

Let me know if you want an intermediate standard.

Kumar

[wallpaperviking]

Toyo standards are very strong, and I don't think you'll face any problem. It would be better to mount heavy lenses on regular Toyo boards, not on adapter boards.
You don't need to modify the standard. An intermediate standard can be fitted with another lens board with a hole slightly larger than the diameter of the lens. Make the lens rest on the bottom of the hole. To avoid scratches on the barrel, the hole can be lined with foam or velvet.

Let me know if you want an intermediate standard.

Kumar

Thanks, much appreciated! That is what I was thinking, having a second standard that the lens would sit on... Tilt/Swing is going to be interesting... :)

[B.S.Kumar]

Thanks, much appreciated! That is what I was thinking, having a second standard that the lens would sit on... Tilt/Swing is going to be interesting... :)

Leave the knobs on the intermediate standard slightly loose so that they can move when pressure is applied eg when tilts and swings are used. Lock them firmly when you finalize your composition.

Kumar

[Jim Andrada]

What I've done on occasion is to use what's sometimes called an "Israeli arm" - a jointed metal rod that locks when you twist a lever and can have a clamp at both ends. I clamp one to a tripod leg and the other to the front end of the camera rail. It just braces and stiffens up the whole assembly.

https://www.bhphotovideo.com/c/search?q=magic%20arm&sts=ma

[wallpaperviking]

Thanks for all the suggestions, they have been of great help! :)

[tgtaylor]

The heaviest lens that I have is probably a 14" (355mm) Wollensak Veritar which is a front mount lens. I use it on the Toyo 810MII and 810G and no sag occurs because no extreme extension is required. I recently ran into a "sag" problem on the MII with a 760mm Apo Nikkor attached and had to switch to the 610mm Apo Nikkor for that shot. That sag occurred when using a "large" acratech leveling base. I've used that same set-up before without any problems so maybe the base's lock weakens over time. It's rated to support a payload of "up to 25 lbs" but the torque at that extension pushes it.