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Actually your comment has given me a design idea which I am going to call "Compensatory Helical Adjustment for Large Format" [CHALF]. The concept requires the rear standard be designed as a unit...

That is my concern. Low friction slides only address the friction issue but does not affect even greater demands - namely the amount of energy required to overcome inertia especially any movement...

Slightly confused - ambiguity about what you refer to as being "bad idea"

Sensible

Crossed rail automation may be a bit power hungry for 5x4 and may be altogether too much for 10x8 without a...

Thank you again. You make a good point



Yep I guess a full frame 4x5 will be a long time coming (4 years or more).

Certainly -There are some additional possibilities. My inclination is to...

It is a good idea however my experience led me to the conclusion that SLR is too bulky and inflexible for most 4x5 applications especially if a way could be found to automate film loading, shutter &...

I think I mentioned somehwere or other that I have been designing stepping motor applications for remote control of shutter, apperture & focus all linked to a laptop. The laptop will also be linked...

Agreed. The 2.5mm insect is adult pest that infests bees. Normally I would want to show active it on the bee so I am not expecting the parasite to occupy 75% of the film width but I do want the...

Thanks for coming back to me. Sorry gave the wrong impression. I only tend to use contimuous lighting in confined quarters. Bee hives are one example!
Dragon & damsel flies in the open I look for...

I agree with everything you say which is why I describe my approach as "tentative". I do believe there is something going on but far from convinced! I am also, given the way in which our eyes work,...

Absolutely


Both lenses were at maximum aperture


Sometime later I had something similar happen when using extension tubes on my Mamiya RZ67 kit. On that occasion I did not check as rigidly...

That is why I chose my bees - you can (if you know how) repeatedly get a series of bees tongues to precisely the same spot time and time again.



Such a difference - (if it does exist) is of an...

I agree foreshortening is a contributing factor but my visual experience inclines me towards the notion there is more to it. Foreshortening should be explained by angle of view alone. That is what...

The best way I can explain my tentative grasp of what I believe to be an actual phenomena is as follows:

It is the term I give to any percieved differential in apparent size of the closest and...

Well I use the canon 5D as a quasi back with my own adapter that places its sensor on the same plane as the GG screen. Even better is my laptop monitoring system which not only shows the GG screen...

Apart from well over 60 years of image making ranging from wet plate to advanced digital techniques & much experimentation {including cracking the problem of how to shoot hdr images which include...

You probably would have done and I would have given you short thrift

Here I agree with your analysis but you had the arrogance to assume I could not possibly have sufficient experience to know...

I have tried to be generous but to be honest I find such language arrogant!

The focus of my question is on lenses but many respondents mistakenly assume I am not thinking of other things. One question one subject is my guideline otherwise - because everything in photography...

55mm Rodenstock is equiv to 14mm on 35mm
Has an image circle of @f22 of 163mm. 4x5 has 153.7 mm diagonal so you only have 5.71% excess coverage.

In this region I prefer my 5.6 58mm schneider...

I can recommend the 58mm super angulon XL -- beautiful lens but do not forget to budget for the center filter. This comment also applies to the 90mm Rodenstock Grandagon N 4.5 which is my preferred...

It is difficult to know without seeing but my guess is you need to file a small slot in the bottom of your linhof board so the middle prong in the mounting area slides into the slot. It sounds as...

With respect I do not think you have carefully read what I have said. I have other ways of getting the subject to the exact location I need them to be so I do NOT need to move the camera. The subject...

I am something of an experimenter as well as a beekeeper! This means I know how to get my subjects and their parasites (around 1.5 -2.5mm) exactly where I want them to be and keep them there...

Unfortunately that includes me mainly on practical grounds because it eliminates the chance of shooting images showing the reactions between multiple insects and between the insect and its activities...

I should have mentioned I was also struck by this problem and have, in anticipation, designed an extension system which will add up to 7" (175mm) for macro work. I will be doing the engineering in...

Depends on the insect <chuckles>
My objective is to go from 1:1 at the lower end to recording a bug with a length of 1/10th of an inch (2.5mm) & rendering it into 75% (3.75 inch or approx 95mm) of...

I am wanting to do some macro using with my TK 45 S.

I am wondering if any macro workers would be willing to tender some advice on suitable lenses and comparative performance. My main interest...

Have you really nailed colour profiling for each of the following:
scanner, screen, processing software, paper, printer, to your working environment?
Do you have a consistent way of resolving...

Does anyone know who stocks spares for Durst 400 series colour analyser built in UK?
David

Incidentally - does anyone have a manual for the 400 series Analyser?

david

Thank you everyone.. I was able to order the fitting via linhof studio in the UK. You guts were on the ball

Thanks

Hi

Does anyone know where I can get a replacement probe for a Durst 400 Series analyser made in England
Thanks in advance
David

As I am in UK I will see what Linhof in germany have to say but their charges for spares are not cheap. If it is a standard engineering part then the costs will be pennies and obtainable from an...

A miniature tap & die set plus a very steady hand is IMHO an essential asset - you need to engineer metal as well as wood.
David

No I am talking about the nipple above the screw that holds the Fresnel in place. I do not think the nipple is manufactured by Linhof - I believe it is a standard engineering fitting - I have seen...

41117

I use a Linhof Technikardan 45S and have a 4x5 Reflex viewer of a different make that I want to use with it. The simplist way would be to construct a frame to attach the viewer to the TK. I...

Hi

I have a really sturdy old floor standing enlarger. It is a Durst 138s Laborator with all the condensers plus a cold cathode system.
The standard light source is dependent upon old fashioned...

Take a look at the Linhof Technikardan. Absolutely brilliant for both backpacking and studio. Well worth its mony.

David Southwell ARPS