Tag Archives: film

Figuring Out F-Stops – Olympus Trip MD

Like the Konica Tomato/Pop-10, the brightest f-stop is the only one given in the manufacturer’s literature. Unlike the Tomato, I couldn’t find information on line so I had to do it myself.

If you don’t care how I arrived at these values and trust a random web page, here’s a table:

ISO Flash F-Stop
100 yes 4
100 no 8
200 yes 5.6
200 no 11
400 yes 8
400 no 16
1000 yes 11
1000 no 22

These values are rounded to the nearest whole stop. YMMV. Not responsible for ruined shots, hives, divorce, or any negative outcome resulting from the use of this information.

The camera is dark gray or black but the LED lights made it look blue.

Trusting that 35mm really is the focal length and f/4 really is the brightest f-stop:
35mm / 4 = 8.75mm diameter with the lens wide open.

You only get F4 at ISO 100 and the flash popped up.

You only get F4 at ISO 100 and the flash popped up.

The area is what’s important for exposure. Focal length/diameter=f-stop only holds for circular apertures. For most, I treated the shapes like diamonds and used (b x h)/2 for the area. To keep things simple, I cropped in to the edge of the lens and then resized to 875 pixels so 100 pixels is one millimeter. Once I had an approximate area, I used the equivalent circle area to get a diameter. SensorsOne has a great calculator so I could just plug in the area instead of using a calculator and working backwards from area=π r² every time.

ISO 200 with the flash came out to about f5 so I rounded it to the nearest full stop at f5.6

ISO 200 with the flash came out to about f5 so I rounded it to the nearest full stop at f5.6


ISO 100 w/o flash & ISO 400 with flash are ~ f8 (7.2 calc'd).

ISO 100 w/o flash & ISO 400 with flash are ~ f8 (7.2 calc’d).


ISO 200 w/o flash & ISO 1000 with flash are ~ f11 (10.3 calc'd).

ISO 200 w/o flash & ISO 1000 with flash are ~ f11 (10.3 calc’d).


The last one was still approximated to a diamond but I had to be more accurate as the apertures got smaller.
At ISO 400 & no flash, the shape got less diamond-like so 2 circles and 2 squares give f14.

At ISO 400 & no flash, the shape got less diamond-like so 2 circles and 2 squares give f14.


ISO 1000 w/o flash is a pill shape so a circle cut in 1/2 and a small rectangle approximate the area for f18.

ISO 1000 w/o flash is a pill shape so a circle cut in 1/2 and a small rectangle approximate the area for f18.

52 Cameras: #191 – Polaroid Super Colorpack


I forgot to add it has the standard lighten/darken control around the light sensor.



Only seven images including the ones in the video. I used three testing another camera.

Part of it is in focus but the wind was whipping the bush.

Part of it is in focus but the wind was whipping the bush.


Nice colors on a gloomy day.

Nice colors on a gloomy day.


Hungry kitty.

Hungry kitty.

52 Cameras: #189 – Minolta A5




We were going to go up Truchas Peak but all of the land grant entrances were locked. One of us had been trying to get a hold of the president for over two weeks. The ranger said it had been open all summer but I guess we were too late in the season. We started going on a hike-for-the-heck-of-it from Santa Barbara Campground and tried Trampas Peak on a lark. We didn’t summit but did OK considering how late we got to the campground after trying every way to Truchas we could find on the map.

I’ll try some exposure stacking – bracketing gave me some good sky-dark mountains and the reverse.

It had been windy - some big trees down.

It had been windy – some big trees down.


I have another version focused at infinity - I'll try focus stacking and post results.

I have another version focused at infinity – I’ll try focus stacking and post results.


I had a smudge on the lens.

I had a smudge on the lens.


Another shot of Jem.

Another shot of Jem.

52 Cameras: # 186 – Olympus Infinity 76 AF (SuperZoom 76S)




First, some found images. Fujicolor Superia 800.
Someone graduated.

Someone graduated.


Chillin' on the boat.

Chillin’ on the boat.


If you know these people or are these people, get a hold of me through the YouTube comments and I’ll get some images to you.

Goober again. If you want a cat to move, try to take its picture.

Goober again. If you want a cat to move, try to take its picture.


Kodak TMAX-100. The images were a little soft but I think that was mostly my development.
They didn't use the ratchet on the press.  More fun to run in circles.

They didn’t use the ratchet on the press. More fun to run in circles.


The proprietor of Wildharber Farm.

The proprietor of Wildharber Farm.


I mentioned organic in the video. I don’t know if the farm is certified but the practices are in line with it. Organic certification can take a long time and it can be pricey to get and maintain it.

52 Cameras: # 185 — Polaroid ProPack




Update 20 December 2019: I shot a frame of GAF Versapan in this camera. This post got too long so I moved it to another post

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A lot of duplication with what is in the video. 10 frames in the pack & the first one jammed. Another, I had a dud bulb in a flash cube and it was black.

This is frame 2. Frame 1 jammed & I exposed this one getting it out.

This is frame 2. Frame 1 jammed & I exposed this one getting it out.


You can tell the bellows pinholes are small because the ghosts have diffraction effects.

You can tell the bellows pinholes are small because the ghosts have diffraction effects.


Looking for an article about diffraction, I discovered digital bellows leak filters are a thing.

Asters in the yard.

Asters in the yard.


Jem & Goober. No sunlight but I was right under the kitchen lights.

Jem & Goober. No sunlight but I was right under the kitchen lights.


Tried spreading developer with a bottle while it processed.

Tried spreading developer with a bottle while it processed.


The manual dev-goo spreading worked a little. The lighter area at middle left would have been blank. Not keeping tight control of pressure, I also lifted some developer – the white areas in the print – and spread it too thin – the light area to the right of Goober. I’d only seen the fern pattern with integral film before. Maybe I can tweak roller pressure and get better results out of Polaroid Originals/Impossible film.

Borrowed the rollers from a Color SuperPack and got proper developing.

Borrowed the rollers from a Color SuperPack and got proper developing.


The picture of Trinity above is a bit overexposed. I was too close and forgot to turn down the ProFlash power setting.

Looking closer, this isn't missing development, it's the bathroom wall. Dev problem would be on the left.

Looking closer, this isn’t missing development, it’s the bathroom wall. Dev problem would be on the left.


Cropped square and auto white balance in GIMP.

Cropped square and auto white balance in GIMP.


I couldn’t figure out why I was getting the beach-ball-of-death while resizing images in Preview. I’d opened the images stored on the iMac from the laptop. Apparently, I was closing Preview before the saves were complete and it did strange things.
The only interesting strange thing.

The only interesting strange thing.

Phound Photos Volume 14

I had several cameras with found film in them. As usual, most had nothing but a couple had something. I had gotten this roll processed at The Camera Shop of Santa Fe and it wasn’t scannable. I set it aside and came back across it while cleaning the office/workshop. Before chucking it, I held it up to the light and could barely make out some images. I scanned and did some heavy correction. The trouble is, it sat around so long I don’t remember what camera it’s from. The film is so dark I can’t make out any edge markings or frame numbers either. After I scan some other found film I may be able to do a “Cat In The Hat” and figure out which film it’s not and hopefully narrow it down.

Update 25 September 2019: I take snapshots with my phone when I find film and I think this is from a Canon Z115. I still don’t remember when or where I acquired it but it’s a start.

I usually don’t post all of the found images from a roll but these tell a cool story.

Building a log house

Building a log house


Hard work

Hard work


And long days

And long days


A lot of progress

A lot of progress


Coming along nicely

Coming along nicely


Every project's nightmare - snow before it's weather tight

Every project’s nightmare – snow before it’s weather tight


Vintage VW and solar panels

Vintage VW and solar panels


Another building.  Workshop?  Studio?

Another building. Workshop? Studio?


Nice views

Nice views


I thought the camper lid was up but it's the building behind it

I thought the camper lid was up but it’s the building behind it


Sunny so maybe work can resume soon

Sunny so maybe work can resume soon


Detail of the side door

Detail of the side door


Detail of the front door - beautiful cedar

Detail of the front door – beautiful cedar


Shadows from the west - solar panel facing south

Shadows from the west – solar panel facing south


After the snow - getting a proper roof

After the snow – getting a proper roof


This is going to be a gorgeous house

This is going to be a gorgeous house


Not sure if these are from before or after the snow

Not sure if these are from before or after the snow


Giddy or exhausted - maybe after

Giddy or exhausted – maybe after


Clowning for the camera

Clowning for the camera


OK, do a serious one

OK, do a serious one


Camera shy

Camera shy


Chillin' on the porch

Chillin’ on the porch


I guessed the order based on progress I could see. Some are probably off but close enough.

52 Cameras: # 184 — Bell & Howell (Canon) Dial 35-2




Kodak Color Plus 200 scanned on a Canon CanoScan 9000f at 2400DPI and resized for the blog. Any edits are in the image file names.
They look like tampons but they're ice sculptures.

They look like tampons but they’re ice sculptures.


Another fun night shot.

Another fun night shot.


I don't remember what this sign is for - I just like the abstract shapes.

I don’t remember what this sign is for – I just like the abstract shapes.


Flamingos at the Flamingo.

Flamingos at the Flamingo.

A little more than half way done with the scanning. If I see something interesting, I’ll add it to the post.