Scanning 35 m negetives

[alex_matus]

HI, I have never done this before, but I have a show coming up, and I have 20 years old 35 m negatives.

So I need to scan them.

The saner is asking me

1. DPI?

2. PPI

3. Resolution

 

I have two rolls one is color, the other is b & w. I will have a Digital show, meaning after I scan the photos, they will be displayed via a projector onto a large wall.

 

Please let me know what the setting should be for scanning.

 

Thank you in advance for your input

 

Kind Regards

 

Alex

[Jochen_S]

If(!) the only goal of scanning is projecting the results, figure out your projector's resolution 8K? 4K? 1080? 720? and scan accordingly. At least in theory.. I'd go for a slightly higher resolution, to have wiggle room, to crop images to taste, since at least I here am shooting somewhat sloppily with primes. - YMMV.

 

Another approach would scan as high resolution as possible, within a price bracket and utilize a computer fast enough to handle those bigger files for projection or prepare dedicated small files for projection with primitive tech. (No offense meant, I am just a huge fan of dirt cheap laptops...)

[Niels - NHSN]

I have yet to see a consumer scanner that extract additional detail above 2400ppi'ish. No need to choke your computer on bloated files above that, unless you are using a Flextight or drum scanner.

[AlanKlein]

FInd out what the projector accepts? For example, does it require jpegs? What DPI does it recommend? Also, how does the projector input the files? Finally, you have to try it out before the show to make sure you have the process down to avoid being embarrassed when it does not work for some reason when everyone is there.

[Jochen_S]

Which scanner did you buy?

2400ppi is indeed realistic. 1200ppi should be more than enough for an unspectacular projector.

If digital ICE is an option, turn it off for the BW roll

[glen_h]

For some scanners, higher resolution is slower.

 

But for such a small number, it is probably best to do the highest resolution of your scanner.

(Though often scanners scan at higher resolution than the optical system supports,

so some of it is wasted.)

 

Many of us have thousands of slides, which we would like to scan, but haven't

gotten around to it and/or it takes too long.

[alex_matus]

FInd out what the projector accepts? For example, does it require jpegs? What DPI does it recommend? Also, how does the projector input the files? Finally, you have to try it out before the show to make sure you have the process down to avoid being embarrassed when it does not work for some reason when everyone is there.

 

Thank you for your reply. Projector is Benq 2050a with Native Full HD 1080p resolution

[q.g._de_bakker]

So 1920 pixels wide in total.

1920 divided by 36 is about 54 pixels per mm. That equates to about 1370 pixels per inch. Anything more cannot be shown by the projector.

[AlanKlein]

I'd scan at 2400bpi.

I believe a laptop with the slide show program and pictures is connected to the projector. But I'm not sure. You have to find out how that works and try it before the actual show. You don't want to be fiddling then or you will lose the people watching.

[JDMvW]

As for the above

† nihil obstat †

 

:|

[BeBu Lamar]

If the projector is only 1080p then you only need to scan a 35mm negative at 1200ppi (in scanner term that is the same as dpi).

[AlanKlein]

If the projector is only 1080p then you only need to scan a 35mm negative at 1200ppi (in scanner term that is the same as dpi).

I'd scan at 2400 to allow for cropping.

[BeBu Lamar]

I'd scan at 2400 to allow for cropping.

at 2400 it would be sufficient for a 4K projector. Although projectors with more than 4K resolution are available they are rare. Yes I would agree with you to scan at 2400.