Archive for July, 2009

The Scanning Problem

Sunday, July 26th, 2009

Full frame image

I’m finding that film photography ends up being very expensive per image, on the range of 50 cents per frame on 35mm and $1 for every medium format frame (still crunching the numbers a bit on this, but I hope to post an analysis soon).  The actual film and developing is not the majority of this cost, surprisingly, especially for black and white film — if you process it at home.  The main bottleneck is getting from the negatives to a published image, be that an image online, or 4×6 prints, or a framed photo on the wall.

As much as I like the purity of film, it is important for me to be able to use my images in a digital format, even if I take them on film.  I know, I know, you are probably wondering why I’m bothering with film in the first place — that’s a debate for another day.  But scanning costs, especially for medium format, quickly skyrocket.  Again, 35mm scanning is readily available, often for $2-$3 more at the same place you get your film developed with 4×6 prints — simply because they just develop your film and then immediately scan it for printing digitally.

For example, the image above was processed at my local Costco.  I ordered the scanned images on a CD and found that the scanned images were about 6 MP, or 3072×2048.  This is approximately 2200 dpi.  You can see from the 100% crop below that these scans are pretty clean, and the resolution is right around the resolution of the film grain.  Not bad, right?

100% crop from the scan

Granted, this is a 400 speed C41 process film, so it is not necessarily the most fine-grained film out there.  But I suspect the only time you’d ever need more resolution than this is if you want to print 8×10s or larger.  And for web use, you could get away with a lot less.

So, that got me thinking… why pay the extra $2 on each roll of 35mm film, or more appropriately, the $10-$20 that it takes to scan medium format film professionally, if I have a flatbed scanner right next to my computer?  Wouldn’t it do a pretty good job of scanning film?

Well, apparently not:

Image scanned on my flatbed scanner.

Yes, this is the best I could do from my Canon MP470.

It boasts 2400×4800 dpi, which should be at least as good as a pro film scanner, right?  Uh… no.  The biggest problem, other than limited resolution (1200 dpi was the best I could get it to do), is tonal range.  I had a really hard time getting it to scan film negatives, which look pretty dark compared to what the scanner is designed for (paper), and then inverting the image without losing the light colors.

Granted, I’ve heard that some of these flatbed scanners have attachments for film, but there’s got to be an easier, cheaper way.  And, for the 120 film I’ll get out of my Yashicamat 124, it should be even easier to get a decent scan (i.e. 4MP or so).

So, I’m going to look into some DIY scanning techniques.  I’ve already formulated a plan using my digital camera, a macro lens, a flash, and some diffusion, so I just need to try it out.  I’ll keep you posted.  FYI, some DIY scanning pages I’ve found are Photocritic’s Makeshift film scanner and DIY scanning solution at Photoforum similar to what I was thinking of.  From what I can tell, the biggest challenge is getting color and dynamic range correct, especially with negative film.  Heck, I might even need to worry about gamma adjustment!

Either way, I’ll keep you posted.

And, in other news, I got some 120 film for the Yashicamat today.  I went ahead and got one of each chemistry: black and white negative, color negative (C-41), and color slide (E-6).

Beta Site!

Saturday, July 25th, 2009

Just a quick note to tell you about the beta version of the site including CamNotes.

The new lens area.

The new notes area.

I’m still in the middle of adjusting the look and feel of the new site, so it will take a while.  The good news is that the look and feel of the new site will be much easier to change than the existing code.  Much of the interface is identical to the previous site, just with reformatting on the lens end of things.

The notes area is styled after the lens area but it has an important distinction — more than just lenses can be listed.  I’ve been using it for the past few weeks in my search for a TLR and it has been working quite well.  Now, you can make a customized page for any item that you can search for on eBay, get historical prices, store your links to info about the item (and your comments!), etc.  I’ll keep adding to it as I think of new features.

I’m not sure when I’ll converge the new area (“dirtbox”, because I needed something past “sandbox”) to the main site — before I do I want to do more on the style sheets and (hopefully) get lens ratings in.

Another set of functionality I’ll implement soon is a search facility for CamNotes.

Feel free to test them out, and have fun!

Slow Down

Friday, July 24th, 2009

Development here has slowed down even more since my day job has been taking a lot more of my time.  I do have a number of new features prototyped in a beta site but I’m waiting to release it until I can fix a number of cosmetic things — it will take a little while at my current rate of development.

I did just purchase a Yashica-Mat 124, so more on that soon.

And, finally, it appears google has dropped this site significantly in its rankings.  I have no idea why, but all search traffic has disappeared, so I’m going to need to track down the reason for that.

Foray Into Film: Minolta X-700 and Kodak BW400CN

Monday, July 6th, 2009

Minolta X-700

I mentioned earlier that I was still interested in trying film again.  Well, I’m currently visiting my parents, so I asked my Dad if I could borrow his Minolta X-700 MPS (what does that MPS stand for?) and run a few rolls of film through it.  He agreed, so I bought a 3-pack of Kodak BW400CN film and took it to the wedding we were attending as well as other family get-togethers.

My Dad hasn’t used his X-700 in about five years, but everything is in good working order and the camera itself has pretty good quality (X-700s still goes for a couple hundred on the used market). When I first held it, it felt very non-ergonomic and awkward compared to my 20D, but once I actually started to use it, everything fell into place and it was very gratifying to shoot with.

Lens detail

My Dad’s camera has a Gemini 28-80mm f/3.5-4.8 on it, which I haven’t researched yet, but is probably a middle of the road zoom lens.  The lens does not support all of the X-700’s features (including the P mode) but it seems like a pretty nice lens.  The push-pull zoom was a bit stiff though, and sometimes gave me a little bit of trouble.

At this point, I’ve shot two rolls with the camera/lens combination, developed one, and feel like I can make a reasonable assessment.  Not as much about the camera, since I do not have a lot of experience with film (it has been at least a decade since I last shot on film), but I feel I can speak to the process of using a decent manual focus camera.

The best way to summarize the experience is to say that I enjoyed using the camera.  As great as digital is, there is something about that solid tactile feeling of releasing the shutter, winding the film, and operating a manual focus lens that a fully automatic digital SLRs rob you of.  In fact, it was even fun to load and unload the film (although I could definitely see how reloading could be annoying in the long run).  In particular, the film advance on the X-700 has a positive, tactile feel and I had great fun using it — at first, I forgot to advance sometimes, but half-way through the first roll I was doing it automatically without thinking about it.  The exposure meter on the X-700 is also surprisingly useful and easy to use once I figured it out, especially the AEL (auto exposure lock) switch.  It helps that the main automatic mode is aperture priority mode, which is the most-used mode on my 20D.

Of course, not everything was good.  Manual focus is a pain in changing environments, and since I was mostly shooting vacation photos (read: kids), I found it hard to get the focus where I wanted it in time to wait for a good expression.  The viewfinder has a split prism, which I found really useful for getting great focus, but your eye has to be aligned well to use it and you also need a vertical (or horizontal) line to focus on.  The end result was a much slower speed of shooting since I had to spend more time lining up the shots, focusing, and conserving film.  Granted, I tend to take my time lining up shots anyway (to a fault, sometimes) but I slowed way down with the X-700 and missed a number of shots because I was not ready for them.

Overall, adjusting between the cameras (I had both the 20D and X-700 in use at times) caused a little confusion, but not as much as I would have expected.  Other than trying to chimp the X-700 and wind the 20D, that is!

What really highlighted how far consumer photography has moved in the last ten or twenty years was developing that first roll of film.

Seven bucks for film processing...

I chose Kodak BW400CN simply because it was the only black and white film Walmart sold.  And I wanted to go with black and white this time around since I’ve been itching to shoot B&W for a while.  Sadly, the choice of black and white films is limited.  Very limited.  In fact, I purchased at Walmart because the local grocery store, Wegmans, only had a few types of film (all Kodak, only 200 and 400 color).  Walmart had slightly more choice, but there was a heck of a lot more display space allotted to the memory cards than the film!  And the reason BW400CN is the only one Walmart stocks?  Because it is a B & W film that can be developed using the color process.  Meaning the places that only do simple photo development (like Walmart) can develop it with the same process they use on color film.

So, I developed the film at Walmart too, using their 1-hour processing.  The first surprise was that it cost $7.25 for single prints!  (although, according to my Dad, it was that expensive in the old days, too).  And, as my Dad pointed out, it is a hybrid film/digital process because the negatives are developed chemically, then scanned, then printed on the digital printers they use for direct digital printing.  I have to search around a bit, but I believe a full chemical processing from negative to print would be pretty expensive and hard to find nowadays.

The end result was that that processing did not seem very authentic to me.  My 4×6 prints have a little bit of grain to them, but I can’t tell if it is the grain of the film or digital noise.  If I shoot on film, I’d rather have the process be chemical the whole way.  On the flip side though, Walmart gives you the option to get your images on a CD for an extra $2.50, an option that I did not take but probably should have, since I do not have a film scanner.

The results, though, were very pleasing.  I’ll probably share some images on my personal blog once I get back home, but I can make some qualitative statements.

Film, since it is a chemical process and non-linear, tends to be a little more forgiving on the high and low side of exposure.  Put another way, it has a higher dynamic range than digital (although digital enthusiasts would argue that digital is catching up quickly).  Yet film also has a certain look to it that is hard to replicate on a computer.  The images from my first roll really impressed me.  Sure, I had a few stinkers, but not as many as I expected and some of them were quite beautiful.  It is hard to say exactly why, but the film seemed to handle highlights, reflection off water, etc. in a much nicer way.

The Kodak BW400CN film, because it is black and white film using the color process, actually does have a bit of a color cast to it.  Specifically, I noticed that lighter areas of the prints tended to be a bit warmer (slightly reddish) while the darker areas were a bit cooler (slightly blue-greenish).  In some cases, that color cast helped the image, but in some cases the colors detracted.  I really don’t understand why Walmart doesn’t do a grayscale conversion after scanning — or maybe they do, but forgot to do it on my prints.

Either way, this experience solidifies my desire to buy a film camera.  I’m leaning towards a medium format camera, probably a low end TLR or something similar, since I’m curious to try the form factor and I think it’d be fun to play with.  I originally was ok with not having a meter built-in, but I may be rethinking that aspect now.  The meter on the X-700 was pretty darn useful when it came down to it.  I’d also like to get a low-end EOS film camera to let me shoot 35mm film with my EF lenses.

Either way, I’ll keep you posted!

Kodak BW400CN and prints