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Wow !!!

Still trying to unpack boxes.,. To make matters worse I feel the need to fab a universal holder that will slip on as many lenses as possible and hold the Cokin P holder in place.

The threaded ring...

Thanks (once again) for the great technical description. I've also got to tip my hat to the poster suggesting that the quickload/readyloads can be very flat before being placed in a holder (if I...

Interesting. I will not be able to test this for some time, but would anyone happen to know how close to mirror like reflectance this technique approaches ?

R.
...

Whew !!! We are finally in the new place (Cheers !!!). The bad news is that some where in 100 or so storage boxes is the Large Format equipment. It will be a number of months before a small...

Good Lord willing. Our church is helping us move, but yesterday we almost hit 100 degrees so its still a pretty scary proposition.

Thanks for posting your specifications (w.r.t. the vacuum back)...

Nice mirror like reflection off the film (at that URL), but (sadly) it is an example of a non-flat surface.

While packing up I found the "Linhof Super Screen" holder for the GG (and fresnel) I...

Once you become more familiar with your camera you might want to (arguably) look into this .,.largeformatphotography.info/forum/showthread.php?p=459308#post459308

I'm getting ready to move (still) so I've got to keep it short. What you describe above should work. However, I'm interested in the limits of fundamental elements (focusing, CIE color space -...

Tried the bits (.011 - .026") with various hole patterns and vacuum strengths but they failed the specular reflection test. Admittedly I need to quantify the film specular reflection with a small...

This is not all that funny, perhaps ironic (or maybe moronic) during difficult times.

I had set up the 4x5 in an upper bedroom that had an outstanding view of rolling hills, oaks and skyline...

Executives for said enterprises probably do not agree, they depend on brand lock-in, forced upgrades, fear, uncertainty and doubt.

Not certifying compatible hardware, firmware, software nor...

Just a little update in the pre-white flag portion on the thread.,.

I've had film perfectly flat by using roll and tape method. It would be very cumbersome
to do this in a film bag (with an IR...

I think "Old Age and Treachery" means that I know more tricks, if not ways to cheat.

There is a 2X magnifier for the DSLRs viewfinder (my spot meter) and some MF cameras have a flip up magnifier...

My opinion is no more relevant than a bunch of koala_bears.,.

That being said, "Famous" architectural photography can be very boring if not suffocating, and when the lines are not kept straight I...

Cokin P (Film + Most 4x5 lenses in a pinch)
FLW (P036) corrects the lighting from florescent "white" bulbs.
FLW (P138) is the graduated version for mixed lighting.
FLD (P046) corrects the lighting...

I use the DSLR with SB-28DX as a master flash to trigger the SB-26 array. Then (if I like what I see) move up to MF or 4x5. During magic time (1-2 hours before sunset) at the beach I've used one...

I've got the 1949 Speed Graphic, for 90mm and 65mm I do this
(ref ...cameramanuals.org/prof_pdf/super_speed_graphic-1.pdf page 6 of 16)
1.) Turn Front Focusing Nob all the way in towards the GG....

Thanks for the kind words. From this point forward "I surrender ..... white flag raised....." is in effect for me.

There are some back posts in the thread that may need to be made (likely to be...

Yes, Absolutely.



Yes, both are in focus in the same .001" plane.

In the example at hand we are using pocket microscopes with fixed magnification. So strictly speaking Parfocal is arguably...

Deleted.

FYI: More discussion on Aerial focusing

"In Answel Adams' book, The Camera, he says that you can drill small holes in the ground glass, and put a small fine wire across each hole on the ground...

Ive been using developed film grain taped tightly to the clear glass at the ideal Critical Dimension (statistically based on dimensional analysis of a matching set of film holder
septums to within...

Thank You for a better problem definition. If I'm not mistaken a simple BFL math model
can be had here Ref: ..answers.com/topic/lens-1 (to model the issue at hand)

This is confusing me: "When...

A lot of work went into destructive examination and analysis of the loupe. So the value is easy to get (If memory serves me correctly). The off brand loupe has the same FL as the Carson (which is...

The principle revelation should be that testing is a good thing. Secondly Press Cameras, VIEW Cameras, ULF, MF, DSLR, Microscopes, Telescopes, tilt and lens maker formulas AND the lowly...

*** SITE ETIQUETTE VIOLATION !!! ***

You are only allowed to squirt wine out of said nose.,. :p

Ref: ...en.wikipedia.org/wiki/File:Camera_obscura2.jpg

Etiquette aside, any guesses as to...

From: Astronomical Optics {Jon Holtzman 2008-08-2}
Ref ...ganymede.nmsu.edu/holtz/a535/ay535notes/node29.html
Physical (diffraction) optics


Ref...

See Attached Image, You can imagine what the 10K curve looks like.

Ref ...xritephoto.com/html/ECM%20Tech%20Brief-en.pdf

Re: Interesting article on optimum f-stop (See Attachment)
Ref ...largeformatphotography.info/forum/showthread.php?p=435999
Ref ...largeformatphotography.info/forum/showthread.php?p=436408
...

I've run out of time and would rather you did not spend any more time here either.

The notes, references and ideas that I continue to post are intended to help revisit the 4x5 Ultra Fine Focusing...

Tilt Tool Update (...tiltmeter.com/DIGITALMODEL.html)
RESOLUTION: 0.1 DEGREES
REPEATABILITY: +/-0.1 DEGREES
$44.00 Model# EDG
PORTABLE. DIGITAL INCLINOMETER.

LF Film Flatness
Not recognized...

It may arguably be evolving .,.

TECHNICAL
Re: 4x5 Ultra Fine Focusing and Calibration
...largeformatphotography.info/forum/showthread.php?p=433823#post433823

Re:Top-end digital concerns...

DISCLAIMER: I'm not getting paid by View Camera, Film or Digital Back OEMs to write this stuff nor do I have any financial interest or feel any need to favor one perspective over another.

DATA...

Loupe Stands and Plenum (in place of GG when focusing with 35-40x Loupe)
...largeformatphotography.info/forum/showthread.php?p=423824#post423824

The kit might be offered sometime in the future if some
improvements can be made.,.

This might deserve consideration:

"four images that suggest if the lens is outstanding (a given) and a 40x...

The phenomena of disbelief when confronted with irrefutable photographic evidence can be quantified as characteristic of the value believer personality type as opposed to the more impartial...

Amen, No disrespect intended or implied.,. :p I simply LOVE real world comparisons and yours is great !!!



Absolutely Outstanding Example and well proven procedure.

I digress as the...

I'd like to read the small print on the clock. If your in the mood see if you can
resolve it in the image plane (with the help of a 40x loupe) and if so maybe try
to get it on ISO 25 film .,.
...

Late 60's, Winterland, S.F. , after show jam, Amen. Daughters shooting B&W in
College (all I had back then) .,.