Very broad subject here....
Very broad subject here....
1) I rarely pay attention to the "availability of film" issues. I am not a professional, so I can pretty much wait until "found" film is available. For instance, I purchased 160 envelopes of quick and readyload on eBay for $120 plus shipping. Many different emulsions, many expired but kept frozen, etc. If I get one out of five keepers I'm in the ball park of purchasing new. HOWEVER, my rate of success on using dated film successfully is considerably higher than that. I look for sellers on eBay who have considerable feedback at 99.5% or better.
2) The Toyo 45A is one of my favorites. The 45A in good user condition has sold in the $500 $600 area for the last 5 plus years. I purchased one for $225 on craigslist in near mint condition. Just sold it to a buyer in the Federation of Russia for $500 plus shipping
3) LF is going to be around for some time. Prices on equipment are steady and actually rising in ULF (11X14 and up). New LF cameras are being constantly produced even now... Shen Hao, Chamonix and many of the better known names. Demand is good.
4) Caution is good, but there's still plenty of time to enjoy the benefits of LF... ie image quality and the joy of the art.
5) Most people will piss away enough money to enjoy LF photography on many other less rewarding pastimes.
6) While the envelope films may not work out for you, sheet film is really not as big an issue as you are "projecting in your mind".
7) There is still the roll film advantage. Focus on the roll film back using the ground glass is the same as for 4X5 or larger. You use a loupe to magnify for focus. You are just using it within the frame lines of the 6X9. Focus on the ground glass, lock the camera movements down, including focus, slide the film holder (even the quick/ready loads) under the ground glass, or in the case of the Rollfilm holder, remove the gg attachment and insert the holder (same with roll film holder), pull the slide, take the shot, re-insert the slide. This, of course presumes the other steps, meter, set shutter/aperture, compensate if need be, etc.
8) You asked before about quality of image... roll film vs. sheet/envelope 4X5. None other than variations in differing emulsions. None other than the evident difference in a small negative vs a large one.
Yes, it's a tricky time to make these film decisions, but I think its going to be around a long time, but will be changing.
I've never been a one emulsion, or even a half dozen emulsion person. There's probably not one film I would say I will never shoot again. Furthermore, I will never be the kind of person who whines that film is dead because they quit making/processing Kodachrome.
Part of the allure of film photography for me is the need to resolve issues like changing emulsions.
NO MATTER HOW YOU LOOK AT IT, DIGITAL CAPTURE IS STILL CHANGING THE RULES FASTER THAN DIMINISHING FILM CHOICES. PARTICULARLY IN THE POST PROCESSING REALM.
Here is a link to a large format forum that will answer many questions for you. Your roll film questions won't be as popular on this forum, since it's not quite large format. However you will find out whatever you want to know about LF cameras, movements, etc, on the larger home site of this link:
http://www.largeformatphotography.info/forum/search.php?searchid=4694026
And back to the Toyo. If you are careful in selection of a 45A, you will have a good camera, with excellent capabilities that I am sure you can retrieve your money from over the next couple of years. I've bought and sold about ten of them in the last five years and always broke even or made a profit.
I wish I hadn't sold the last one, but I made $275 on it. Now, keeping eyes out for another one, or any Super Graphic. I have a Super that I stripped down to about 4 pounds and kept all the movements. That's as close to a Toyo field camera that I can get.
SPECIAL NOTE....
There are 12 sellers right now on eBay with just Fuji Quickload film. There is a Quickload holder on a Buy It Now for $39.95. Two years ago Fuji Quickload holders easily sold for $100, and new ones still do. There are currently 27 sellers of Kodak Readyload (lots of Ektachrome) Various B&W in both mfr listings.