Tag Archives: photography

52 Cameras: Apple QuickTake 200 Viewfinder Parallax

A YouTube viewer asked about the parallax error when using the clip-on optical viewfinder. I did a quick & dirty experiment to find out. Original Quicktake 200 post is here.

The 3 focus ranges are 9-13cm for close-up, 45-90cm for portrait, & 90cm-infinity for landscape. The manual says, “IMPORTANT Do not use the close-up focus when you use the viewfinder. It is not accurate.” I didn’t bother with the close up setting but the next worst parallax would be the nearest focus of the portrait setting. The manual also says, “Estimate the focal distance from the front surface of the LCD screen to the object being photographed.” The LCD is on the back so I guess they mean its surface.

I put this on the wall in the kitchen.

Sometimes, science is ugly.

Sometimes, science is ugly.


I put the camera on a small tripod, and measured the distance to the wall so the LCD was 45cm away. I looked as straight through the viewfinder as I could and held still while M slid her finger along the ruler toward the center until I could see it. We repeated that for left, right, top, and bottom. The measurements are just relative to each other, not meaningful in themselves.

Left: 29cm, Right: 67cm, Top: 10cm, Bottom: 37cm

Next, I snapped a picture with the camera in the same place. Ignore the date & time – I didn’t set the camera’s clock.

I used composite out to the old TV instead of digging out the old laptop and Smartmedia floppy adapter.

I used composite out to the old TV instead of digging out the old laptop and Smartmedia floppy adapter.


The image captured these measurements.

Left: 28cm, Right: 60cm, Top: 13cm, Bottom: 38cm

I was a little off reading the ruler. This diagram shows the relationship of the viewfinder view and the sensor image.

Pretty wide angle and not too bad for a cheap plastic clip-on viewfinder.

Pretty wide angle and not too bad for a cheap plastic clip-on viewfinder.

52 Cameras: #197 – Canon Sure Shot Ace


The “Phound Photos” post for this camera: http://exit272.com/?p=4897



This is what I meant in the video. Down low = "Hey, whatcha got?"

This is what I meant in the video. Down low = “Hey, whatcha got?”


Ristra at the Santa Fe Convention Center.

Ristra at the Santa Fe Convention Center.


Sculpture at the Santa Fe Convention Center.

Sculpture at the Santa Fe Convention Center.


Poor Jem with his eyes blown out by the flash.

Poor Jem with his eyes blown out by the flash.

Trip MD – Playing With GIMP Filters On A Ruined Roll

Kind of a long post so scroll down or go back if you get bored.

I mentioned the failed 1st roll (Alaris 200 color print film) in the Olympus Trip MD post. My C-41 developer was too old so most of the negatives came out really bad. The scanner has to boost the gain to get something and it introduces a lot of noise. Once I saw them, I didn’t really take care of them and they got dust and scratches. I scanned them any way but results were not pretty. While another roll was scanning, I played with some GIMP filters to kill time.

Peach tree.

Peach tree.


Peach tree - edge detect filter.

Peach tree – edge detect filter.


Peach tree - neon filter. I can't remember if neon was added to edge.

Peach tree – neon filter. I can’t remember if neon was added to edge.


Most of the filters can be tuned so the effects aren’t so drastic but I was messing with scans I didn’t really care about any way.

Our friend's horse. I seem to have gotten my shadow in a lot of these too.

Our friend’s horse. I seem to have gotten my shadow in a lot of these too.


Our friend's horse - "old photo" filter.

Our friend’s horse – “old photo” filter.


Grass & Flower.

Grass & Flower.


Grass & Flower - cropped to the grass.

Grass & Flower – cropped to the grass.


These filtered versions of the grass aren’t really identifiable, but they came out kind of cool.
Grass - "circuit" filter.

Grass – “circuit” filter.


Grass - "lava" filter.

Grass – “lava” filter.


Mean turkey and a rooster - a lousy image without the dev problem.

Mean turkey and a rooster – a lousy image without the dev problem.


Mean turkey and a rooster - edge filter.

Mean turkey and a rooster – edge filter.


Propane tank, apple tree, & truck.

Propane tank, apple tree, & truck.


Propane tank, apple tree, & truck - "graphic pen" filter.

Propane tank, apple tree, & truck – “graphic pen” filter.


Dragon kite.

Dragon kite.


Dragon kite - cropped & neon filter.

Dragon kite – cropped & neon filter.


And the best for last.
Trinity is not happy.

Trinity is not happy.


Trinity is not happy - cropped & neon filter.

Trinity is not happy – cropped & neon filter.


Trinity is not happy - cropped & "little planet" filter.

Trinity is not happy – cropped & “little planet” filter.

GIMP has gotten really good. I can’t find the Photoshop Elements 8 installer I got with the Canon Scanner. I re-bought PSE (version 15) since Adobe doesn’t have installers going back that far, even if you have your serial number. I think it was installed on a drive I wiped without freeing up the license so I don’t know if it’s doable even if I find the disc. PSE 15 kind of sucks compared to the older version. I just have GIMP 2.10 on the laptop. The workflow is different but it easily rivals PSE now and maybe full Photoshop. I hate the software as a service model so even if I thought PS “Creative Cloud” was worth the extra money, I probably wouldn’t get it.

52 Cameras: #195 – Olympus Trip MD


The site with the lens construction info:
http://www.optiksammlung.de/Olympus/TripMD.html

The manual is under Manuals & Ephemera.



I’ll do a separate post about the failed 1st roll. I ended up having some fun with it.

Jem - gray and orange always go together.

Jem – gray and orange always go together.


A new (to us) stray in the neighborhood. King Tux. Those are some honkin' toe beans.

A new (to us) stray in the neighborhood. King Tux. Those are some honkin’ toe beans.


Central Ave. in Albuquerque.

Central Ave. in Albuquerque.


Old firetrucks and wreckers.

Old firetrucks and wreckers.


I couldn't decide so here's a cropped version too.

I couldn’t decide so here’s a cropped version too.


In the above two images, I like the barbed wire and fence receding into the distance in the first one. I also like the focus on the vehicles in the second one.

I got up too late to get pristine snow but it's still pretty.

I got up too late to get pristine snow but it’s still pretty.


Red picnic table at the Camel Rock Valero.

Red picnic table at the Camel Rock Valero.


The background colors were “meh” and there were some weird red flares on the wall so I desaturated everything but the table.

52 Cameras: #194 – Nikon Coolpix L310


Nikon still has the manual here.



A photo that was on the SD card when I got the camera.
 The previous owner had a lot of bird images.

The previous owner had a lot of bird images.


I’ll do a separate “Phound Photos” post. The card had images from 14 Dec 2012 to 11 Jul 2013.

McPigeons in Bernalillo, NM.

McPigeons in Bernalillo, NM.


Goober.

Goober.


Storm over the Jemez Mountains.

Storm over the Jemez Mountains.


Not a scene mode but it has settings for B&W, sepia, cyanotype, & vivid.

Not a scene mode but it has settings for B&W, sepia, cyanotype, & vivid.


Doorbell & shadow.

Doorbell & shadow.

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.