Luminous Landscape Forum > Architecture shoots, what do you use ?

Full Version: Architecture shoots, what do you use ?

Luminous Landscape Forum > Equipment & Techniques > Medium Format Digital Backs and Photography

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adammork

May 20 2007, 05:30 AM

QUOTE (Jae_Moon @ May 19 2007, 10:54 PM)

I shoot landscape, not architecture, with P45 and Arca-Swiss 6x9. I currently use 35mm Digitar as my widest lens. I gave up on the factory original GG and have been using one from Maxwell Precsion Optics very satisfactorily. It's focus is tack sharp and screen is a magnitude brighter than the factory original.

I am in process of getting 24mm Digitar. It will focus infinity with 15mm recessed lens board, and with rear standard reversed. I use center filter for both 35 and 47, and will use one with 24 also.

Regarding an accidental drop of DB, I am being careful, take time and took out an insurance for it

Jae Moon

Dear Jae

I have used the 24mm on both an Arca monolith 6x9 and a Misura, yes it can focus at infinity, but I had a very hard time getting the focus on the entire frame, the result, from my point of view, varied from just useable to not useable at all....

The focus distance, as I recall from memory, from about 0.6 meter to infinity is about 1.6 millimetres, so even the slightest misalignment in the camera will show clearly.

That’s one of the main reasons for, that I'm using an Alpa XY these days.

Very best,
Adam

Jae_Moon

May 20 2007, 08:19 AM

QUOTE (Prakash Patel @ May 19 2007, 10:59 PM)

Jae

Is your P45 a Hassy"V" mount? What type of GG did you get from Maxwell Optics?
I also use an Arca for normal to telephoto work and would like a more precise viewing system. Does your ground glass have a split image focus?
For ultra wide lenses, you are going to be challenged.............the helical focus mount of a 24xl/ Cambo WDS moves the lens only one mm. To move the focus of the lens one millimeter you have to rotate the lens focusing grip 5 inches.

QUOTE (adammork @ May 20 2007, 06:30 AM)

have used the 24mm on both an Arca monolith 6x9 and a Misura, yes it can focus at infinity, but I had a very hard time getting the focus on the entire frame, the result, from my point of view, varied from just useable to not useable at all....

The focus distance, as I recall from memory, from about 0.6 meter to infinity is about 1.6 millimetres, so even the slightest misalignment in the camera will show clearly..

Adam:

As I indicated earlier, I do not have 24mm yet and 35mm is my widest lens. Both you and Prakash are right, it is not easy to focus A-S with its not-so-precise rack and pinion gearing. I wish they would implement more precision gearing for focus, such as the one used in a micrometer.

I believe both 24 and 35mm focus from infinity to close up within less than 1.5mm movement of focusing rail, which is less than a wiggle of the knob.

A question to Adam, I am not totally clear what you mean by the difficulty of focusing entire frame. Is it with front-tilt or without any movement? The image circle of 24mm barely cover the P45 image sensor, 60mm diagonal. I would appreciate it much if you elaborate your experiences in more details. I didn't write the check for 24mm yet.

Jae Moon

adammork

May 20 2007, 09:20 AM

QUOTE (Jae_Moon @ May 20 2007, 01:19 PM)

Prakash:

My P45 is H mount so I can share it between Arca-Swiss and H2 (for auto focus ). When I got my A-S, I could not focus with its provided GG; not only it is dark and very grainy its focusing is off slightly even in best circumstances. I got Maxwell Hi Lux Brilliant Matt GG which has much brighter screen with finer Fresnel lens patterns. It does not have the split image focus. I use a Schneider loupe (10x) for final focusing and Wista 5x for general focusing and composingI
Adam:

As I indicated earlier, I do not have 24mm yet and 35mm is my widest lens. Both you and Prakash are right, it is not easy to focus A-S with its not-so-precise rack and pinion gearing. I wish they would implement more precision gearing for focus, such as the one used in a micrometer.

I believe both 24 and 35mm focus from infinity to close up within less than 1.5mm movement of focusing rail, which is less than a wiggle of the knob.

A question to Adam, I am not totally clear what you mean by the difficulty of focusing entire frame. Is it with front-tilt or without any movement? The image circle of 24mm barely cover the P45 image sensor, 60mm diagonal. I would appreciate it much if you elaborate your experiences in more details. I didn't write the check for 24mm yet.

Jae Moon

Sorry for not being precise. I meant, I had a very hard time, with the 24mm, to produce a sharp image, edge to edge with my arca's without any movements - if you standards not are completely align with each other you will get one side of the frame in focus and the other out of focus.

I could not achieve that perfect alignment with my Arca's most of the time.

The 35 mm works ok on the Arca if you are careful. But the 24 are a different beast in my opinion.

I would strongly recommend, if possible, trying the 24mm on your camera to see if it works for you, before you write the check.

Before I got the Alpa XY, I first got the Alpa TC only for use with the 24 mm, a compact and precise solution that don't take up much more space in the bag than a 24 mm on a lensboard - cost is an other story...

Very best,
Adam

uaiomex

May 20 2007, 01:40 PM

Stefan:
Can you explain what do you mean by "spacer ring"?

And where should I look for them?
Better yet, if you can show us a picture of it.
Much better yet, a picture of the whole contraption too.

If you prefer, you can email me direct, Thanks. uaiocervantes@gmail.com

QUOTE (stefan marquardt @ May 20 2007, 01:23 AM)

Eduardo, when I built mine, I used a spacer ring(?) to get an camera-mount and a lens-mount. I fixed the lensmount on a recessed arca lensboard and mounted the lens - and thats important!!!: on the front-element-side to an other arca recessed lensboard. with that trick, you can focus easy to infinity and have hugh amount of shift too. I built myself an universal lensmountplatething which lets me connect any lens from any brand to it.
this pic (http://www.stefanmarquardt-architekturbild.de/achitecture_nr_1_frima__gmp/achitecture_nr_1_frima__gmp.html) was one of my first pictures with this setup and consisted of 6 stiched sd9 images.

stefan

Morgan_Moore

May 20 2007, 02:02 PM

QUOTE (uaiomex @ May 20 2007, 06:40 PM)

Can you explain what do you mean by "spacer ring"?

Extension tube for macro photography ??

S

stefan marquardt

May 21 2007, 02:40 AM

[quote=Morgan_Moore,May 20 2007, 02:02 PM]
Extension tube for macro photography ??

exactly. couldn´t think of the right name. you find them on ebay cheap. I am afraid, I cant take a pic because the camera is in a different location and partly dissembled. I dont use it very often since I have the zörk and the zd.

stefan

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