November/December View Camera Mag

[photobackpacker]

Steve -

I got the Nov/Dec issue. Great stuff. In addition to the continued great content, the interview with LF camera sellers were a breath of fresh air and a ray of hope. Thank you

There are only a few magazines I keep. This is one of them.

 

[Lee L]

It also has the review of the Zone VI VC-LED head, which is interesting to read. I've been waiting to see the construction and cost on this. I've thought about this since learning about blue/green split filtration, and might build my own at some point. The head is basically two 99 step attenuators for the LEDs, separately controlled, with settings of 50 being half power output, and it sounds like the 00 setting is full off. There's a central button that turns both channels full on for focusing, etc.

Lee

 

[Aggie]

It also has the review of the Zone VI VC-LED head, which is interesting to read. I've been waiting to see the construction and cost on this. I've thought about this since learning about blue/green split filtration, and might build my own at some point. The head is basically two 99 step attenuators for the LEDs, separately controlled, with settings of 50 being half power output, and it sounds like the 00 setting is full off. There's a central button that turns both channels full on for focusing, etc.

Lee

Can you translate that for one with blonde roots?

 

[L Gebhardt]

The head has two light sources built in: one blue and the other green. Both use LEDs but that is immaterial.

You can set the brightness of each channel separately from full on to full off. By setting different ratios of blue and green you can get different contrasts out of VC paper.

 

[Lee L]

Can you translate that for one with blonde roots?

Sorry Aggie. BTW, I had blonde roots before I was 18, but they went more reddish at that point, and a high percentage are now gray. My wife is also blonde, but she's a Ph.D. who teaches classes that require calculus, differential equations, and matrix transformations to grasp the subject properly. So even if I saw your blonde roots, I wouldn't make any assumptions.

This is a 4x5 variable contrast head that uses blue and green LEDs as a light source. It's available from Calumet and has been mentioned here on APUG. The blue and green LED arrays are controlled by separate attenuators (potentiometers/rheostats) so that their output, and consequently their relative contributions to the enlargement exposure can be nearly continuously varied. This gives the same range of results on variable contrast papers as two separate exposures with blue and green filters, commonly used in a white light enlarger for split filter printing.

It's a very cool idea (literally and figuratively), and with the recent price drops in high output green and blue LEDs, was bound to happen. I've calculated that I could get blue and green high output LEDs and circuit boards to mount them in for something less than $150. That's with half inch spacing and an array of about 99 LEDs covering 4x5 inches. That, an inexpensive power supply, a handful of resistors, a couple of potentiometers, and some diffusion plastic would duplicate the Zone VI head's function in some basic form. Add a PIC (a programmable integrated circuit used as a control device) and a little programming and you could do something home brewed that's very cool.

Lee

 

[Aggie]

Thank You both. Not that I can't grasp the concept, it was just in that particular venacular I was seeing it float over my head. Your explanations helped and are totally understandable at least to me.

I dye my hair red so I am a blonde in denial. Seriously I collect college degrees like others collect antiques. Maybe the next one will be English so I can get rid of this poor grammer/spelling trait I have. ( I get bored and take college classes, over 25 years I have augmented my orginal dual degree)

 

[roteague]

Steve -

I got the Nov/Dec issue. Great stuff. In addition to the continued great content, the interview with LF camera sellers were a breath of fresh air and a ray of hope. Thank you

There are only a few magazines I keep. This is one of them.

Just think .... three more months and I may get it as well. I just checked the bookstore yesterday, and the July/August issue is still on the shelves.

 

[BradS]

Not here yet either . Will keep looking sounds like a "good one".

 

[grahamp]

[...]
Add a PIC (a programmable integrated circuit used as a control device) and a little programming and you could do something home brewed that's very cool.

Lee

With LEDs as the light source, it would be cool by definition...

 

[Lee L]

With LEDs as the light source, it would be cool by definition...

Yes, the literal part of "literally and figuratively". I've been looking at the RH Designs Stop Clock Pro, which has a two separate timing channels for split filter printing, and also thinking about making a home built green/blue LED head over the last 6 months or so. The review of the Zone VI head in View Camera and more recent thoughts about a Stop Clock Pro just merged into an idea for a home brew PIC controlled two channel attenuator/timer connected to the light source. Unfortunately, I don't have the time for a project like this now, but the LED head for my D5 should be simple from available parts that would fit into the adjustable condenser housing. See the 9 LED circuit board strips and high output blue and green LEDs at superbrightleds.com for inspiration.

Lee

 

[Struan Gray]

Proof that photo.net is not entirely dead:

www.photo.net/bboard/q-and-a-fetch-msg?msg_id=00E1yL

 

[Lee L]

And after some digging:

http://huws.org.uk/

for a couple of PIC controlled blue/green enlarger heads for MF and 4x5 with circuit diagrams and PIC source code.

Are we far enough off topic yet? Sorry...

Lee

 

[Bob F.]

And after some digging:

http://huws.org.uk/

for a couple of PIC controlled blue/green enlarger heads for MF and 4x5 with circuit diagrams and PIC source code.

Are we far enough off topic yet? Sorry...

Lee

Or Dead Link Removed for those of us with an allergy to popups... ( I know: Firefox & Google toolbar etc blocks them, but I just resent their very existence, speading their evil upon the face of the Earth... )

Huw has shown up here from time to time - don't know if he still around: hasn't posted since March.

Cheers, Bob.

 

[hortense]

Nov/Dec issue. ...interview with LF camera sellers were a breath of fresh air and a ray of hope.

Yes, this was an interesting interview but poorly written or, should I say poorly asked questions. I found it quite "rambling" many with standard bullshit answers. The the additional articles by Bill Andres and Richard Newman that were interesting.; the editing has improved.

 

[hortense]

Construction

Too complicated for me but, I would buy one if it would fit my 4x5 Bessler.

 

[steve simmons]

Hortense

What questions would you like to have asked. We wil do a followup and can ask them if you make suggestions.

There were some editing mistakes in the issue and we are putting corrections in the Free Articles section of our web site

www.viewcamera.com

steve simmons