A Replacement For The Damaged Fujifilm S1

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In a moment of extreme weakness, I bought a Fujifilm S2 on the Bay. It will complement my Canon XTi, and Pentax istD. Now I can use just about any lens made for 35MM format cameras by simply mounting a non-optical adapter to one of the three cameras.

I await its arrival to set up a shootout with my lenses; to be posted here. I have several M42, a couple Nikon and a dozen custom mounted pre-1939 uncoated lenses to try out. I am figuring at least three hours will be needed to finish it all. Perhaps three segments by aperture settings, to keep the lighting somewhat even, on a very clear day. 10:30AM to 1:30PM seems a goal.

Nearby my house is a small park that has a nice section where there are trees, shrubs, buildings, play ground equipment, etc to allow DOF to be apparent. The results will be posted here on separate pages. Maybe within a month I will get it completed.

Spring Is Here ! At Least Until Tomorrow …….

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We got a reprieve today. Last night the forecast was for 1-3 inches of snow and overcast for today. The snow did not fall and the Sun has been out all day. I took the time to take a few pictures with my Canon XTi with a Sears 50/1.4 M42 lens mounted with an adapter.

These were all taken at f1.4 to try out the small depth of field. I guess I am not going to have to spend money on a new EF Canon 50/1.4 lens. The Sears lens had been pushed into the back of a drawer after I compared it to my Canon EF 50/1.8 metal mount in relation to the additional brightness available. I just never considered using it seriously for actual photography. The DOF difference and the brightness have made me a believer, also it is nice to have a metal lens.

Anyone know the years of manufacture/sale for the Sears lens? Also, what company manufactured it ?

Catching Up

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NOTE POSTED 04-17-2009 – I have been trying to get a handle on the cross slit project since this was originally posted here. At this moment, and I don’t see my mind being changed, I am abandoning any further work or time. I believe that simply put, since there are two distinctly different focal lengths there will always be one plane that is stretched out of proportion. I am planning to continue into the world of old manual focus M42 lenses and even older lenses from folders on my Canon XTi. Of course, there will still be occasional side trips into pinhole land.

Original text starts here:
I did receive the SD card I needed in order to test my digital stereo rig. As soon as there is a decent day I will be trying it out, along with some more shots with the homemade wood stereo camera and, of course, the newest toy – that double slit camera cap. The main problem for the rest of the year is the weather. With an annual snowfall of over 110″ per year combined with one of the lowest percentages of available sun received, the subject matter until Spring is mainly bare trees and snow. In fact, guess what was in the air just a half hour ago ? 

 

Stereo Depth of Field Table

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I ran across this table today – related to be from the 50’s with no other reference given. By picking the nearest and farthest points you can figure out the best distance between the stereo lenses. By putting in the distance between the lenses, you can get the depth of field for your camera. I make no promise as to the usefulness or accuracy of this information. I am simply passing it along as a matter of possible interest.

The distance of		The STEREO BASE in MILIMETERS
the nearest object		15	30	65	125	250	500	1000
in METERS		Here are the maximum distances of the FARTHEST object in METERS
0.1		0.12	0.11
0.2		0.27	0.23	0.21
0.3		0.51	0.38	0.33	0.31
0.4		0.88	0.55	0.45	0.43	0.41
0.5		1.56	0.76	0.59	0.54	0.52	0.51
0.6		3.2	1	0.74	0.66	0.63	0.62	0.61
0.7		14	1.33	0.9	0.79	0.74	0.72	0.71
0.8		infinite	1.75	1.07	0.9	0.85	0.83	0.81
0.9			2.3	1.26	1.05	0.97	0.94	0.92
1			3.1	1.45	1.2	1.1	1.04	1.02
1.2			6.7	1.92	1.48	1.32	1.26	1.23
1.4			29	2.5	1.8	1.51	1.48	1.44
1.6			infinite	3.2	2.15	1.83	1.71	1.65
1.8				4.1	2.52	2.1	1.94	1.86
2				5.4	3	2.4	2.2	2.1
2.5				12	4.2	3.1	2.8	2.6
3				52	5.8	4.4	3.4	3.2
3.5				infinite	8	5	4	3.8
4					11	6	4.8	4.4
5					27	8.5	6	5.6
6					250	12	8	6.8
7					infinite	16	10	8
8						23	12	9.5
9						54	19	13
10						infinite	25	17
12.5							38	22
15							108	34
20							infinite	51
25								77
30								216
40								infinite
50

Digital Stereo Pinhole Project Finished

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The mechanical part of the project is finished. I just have to wait for an SD card to arrive and get the batteries re-charged. The weather is calling for rain for the next four days, so it appears that somewhere around October 1 I will get a chance to try the rig. The yellow object behind the cameras is a tape measure holding the rig up for the pics.

A construction story and related pictures for this stereo digital pinhole camera are posted on my website > http://photographyhacks.org <, a clickable link is in the Blotlist to the right >>>>>>>>>>>>

Also there is a short ‘how to’ on making pinholes. To make a pinhole cap for any camera with removable lenses, simply make a hole approximately 3/8″ in diameter in the dead center of a body cap. Then glue the pinhole to the inside of the cap, centering the pinhole, and paint as much of the metal flat black as possible without filling in the pinhole, this to cut down on reflections. Do not worry about the exact size of the pinhole for your first attempt. Just do it and enjoy the results.

Update 10-03-2008: I just put a stereo camera DOF – Depth Of Field – table from the 1950’s in a posting today.

Update March 2009: Like everything that seems simple, this project has come back to bite me. I was in such a hurry to get finished, that I never turned on the cameras to sight the placement of the pinholes relative to the sensor. In other words, it turned out cross-eyed, Now I will have to pop off the pinhole assembly and re-attach them more carefully. Oh well.