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In my last trip to Japan (Kyoto/Osaka) I wanted to buy ACROS/Microfine.

I bought all microfine developer available that day on the Yodobashi store. But they didn't have any ACROS sheet film, so I...

brightmatter, great ! And thanks for this thread.

Yes, there was (http://www.largeformatphotography.info/forum/showthread.php?111106-Epson-4870-DIY-film-holder-dimensions).

Tim, Thank you very much. The notch at the top is for the CCD to get to...

Yes. Forget about marketing numbers. At the end, this is what matters !

Drum speed: 900 rpm (15 rps)
Drum linear area per revolution: 12" (304mm)
DPI: 4000 dpi

15 rps * 12" * 4000 dpi = 720,000 samples per second

Oversampling needed to get 16 bits from a 12 bit...

Bettersense,

The 12 bit ADC AD9220 (max 10Msps) at normal drum speeds (around 900 rpm) and usual dpi resolutions (2000 ~ 4000 dpi) cannot use oversampling to get 4 extra bits.

Do the maths. I...

True. Be carefull and turn off the flash when taking pics. And also be carefull when handling the board, those ICs are ESD (electrostatic discharge) sensitive devices.

Thank you for sharing this....

Hi onnect17,

Thank you for sharing with us the ADC IC component.

I think that they say its a "48 bit workflow" scanner and that the "output" file is 16 bit RGB.
...

Thank you Tim !

Hi,

Please, what are the dimensions for the top rectangle openning?

I want it for a DIY 4x5 film holder.

Thanks

Please, can you tell us (if you know) what is the reference or part number for that material?

Thanks Darin. Interesting option with high CRI, but just only 2700K.

I best source I have found is a LED with 95 CRI @ 5000K (GSPW1653JTE-50Z from japanese Stanley-Electric). Its also sold in a PCB board in UK/EU by rs-components (ILH-SJ01-WW95-SC201).

The led is...

Calibre61, welcome to the forum and thank you for your comments.

The thinnest leather I was able to obtain (in Spain) had between 0.5mm and 0.7mm of thickness. And not in big pieces (from small...

http://213.251.184.113/largeformatphotography/taipei101.png

Taipei 101 : Penta 45F, Caltar IIE 6.8/210mm, Provia 100F 4x5 @ f16 - 30sec

I want to do the same in 8x10, but I have no lens with...

Thanks QT, volunteers/moderators, every one here, and those that are no longer here ... for this great oasis !

Jeffrey, What modern lenses did you tried? I have read that Rokkor lens is a tessar design.

I have two Autocords, some day I will put them togheter to make a true stereo. My G-claron 305mm makes...

Did you take a look at germany film stores? I did the exercise (for 8x10 ISO film at fotoimpex and macodirect).

FOMAPAN (CZ), ADOX (DE), DELTA (UK), TMAX (US) (no japanese film !)

a) 2.36...

I am curious too to know more about this. As StoneNYC, at first I though about nude pics, but it is like nonsense.

Maybe military installations? or railway pictures? I heard that railway pictures...

Last summer I spent a long time trying to find transparency film in 5x7 format (or even 13x18) but haven't found anything. I am not ULF shooter but I want you to succed, because I hope this also...

I am curious why some of you prefer a copy rather than the original.

I currently have no enlarger for B&W. The lab that develop my transparency film has a screen SG-8060p drum scanner and prints...

Hi Paulr,

Let me explain: I don't mean to send a CD signed by hand. It's related to the legal aspect.

The first option was to send the exposed transparency (the work itself) to other person....

I hope you will get all the funding. Good luck Lee !

I am wondering why you forget to include 7x17 color film itself as reward.

That way it would also benefit the ULF people here, and you will...

Hi,

Some time ago there was a question about whether to sell or not your own work (film). I cannot find the thread but I remember that all the answers said 'NO'.

I am currently thinking about...

Hi Andrey,

Very nice camera, and lightweight 3.4Kg !

I wonder how much weight can you reduce if bellows just only cover half lenght (340mm instead of 680mm), as my longest lens is a G-Claron...

Daniel, thank you for the list.

Some statistics:


cameras under 4Kg (8.8lbs) just 4
cameras under 3Kg (6.6lbs) just 1

I recently have added a 5x7 back to my rittreck. So I can use 4x5...

It's true, I agree.

Vinny, that lens is the first one in several months. Last bid for one of this (not sure if I've deleted any recent mail) was on 26 oct 2011 ($936 USD). So, I am sure there will...

If you have one for sale I think fair price is ...., hum .... $450. Half its original price is quite fair :-)

PS: (edit), I want to buy one.

I would say "only for black and white shooters".

BW chemicals and developers are cheap, well documented and easily accesible to buy. Not the same for C41 or E6.

Have you ever tried to make your...

Please, can you provide details about which workshops, and at what minimal cost?

When I ask for small quantities, those small workshops always reply with big $$$. And not all of them want to get...

With $1200 you have budget for one new (light) camera ($900) + a good 150 to 210mm lens (200) + 5 double cut filmholders ($100)

or a second hand (not too heavy) field camera ($600) + one very...

35mm film is 24x36mm (or 0,9449" x 1,4173")

Your film is 3.0833" x 4.625"

You have a multiplier ratio (different from xy ratio) of 3,263.

If you want the same picture from a 50mm focal...

No. See the first post. He wants the exact equivalent. So we need to crop 4x5 negative to have the same aspect ratio as 35mm. 35mm has a ratio of 1.5 (36mm/24mm).

So It's a mathematical answer....

Marshallarts, your numbers are wrong:




4x5" equivalent focal is 166.67mm (80x120mm) for 1.5x aspect ratio.



Also take into account that ratio is 3.3333(period). Not number four as used...

Thanks Harley !! It is for comments like this one that I found this forum a gold of mine ... unvaluable good information. Not so many of us can test such a great variety of cameras (some of then...

Checklist:


Camera: $85 .. $2500 (modern field camera starts from $450)
(monorail starts from $85)
Lens: $50 .. $1000
Filmholders: $15 .. $30 piece.
...

First of all: What is your price range? A good complete kit can be expensive, but money saver.



It's better to think twice and buy just once than to buy two times. LF mistakes are very...

Drew, thanks for the advice about geometry.

Have you seen Ladislav´s website? (http://www.horolezec.cz/blog-engl/index.php?action=item&itemid=5)

Has a picture showing the vibration reducer...

Brian, Great trick !! Did you already tried?

I would expect 0.180 micron white PET sheet to sell at more price than polaroid 55 ;)

Anyone knows where to find this material?



I think...

Hello,

What is the recomended diameter size for holes in 4x5 vacuum film holders (does anyone have a Linhof vacuum film holder to check?).

In Ladislav Kamarád's website he says that he use...