Depth of field scale for Stereo Realist 3.5 camera - NEW!

Description

Stereo Realist
Depth of Field Scale (DOF) for Stereo Realist f3.5
Offered for sale here is a Depth of Field scale for your Stereo Realist (f3.5 model, I also have the scale for f2.8 in a different sale).
Installation:
Set focusing near infinity and remove the focusing indicator/camera strap holder by removing three screws (two are shown, one is at the top, you will have to remove the film advance knob to reach it)  Make sure not to lose the strap lug.
Install DOF scale.  Make sure not to move the focusing dial and lose track of which round the focusing is in.  Replace screws.
Note
:
The focusing indicator might be in a slightly different position in the DOF scale (this is the case in the two Realists shown above).  In this case, it is recommended that the focusing is checked and possibly recalibrated, for optimum focusing accuracy.  This is not an easy thing to do, but I do it routinely in my Stereo Realist repairs.
Uses of the DOF scale
For a given focusing distance and f-stop, you can
read the depth of field
as follows:  Find the two f-stop markings in the scale (if the lens aperture is set at f8, look for the two 8 marks in the DOF scale).  These mark the depth of field (DOF).
DOF is the distance range from the camera that it is in acceptably good focus.  This depends on the f-stop.  The smaller the f-stop (high numerical values), the larger the DOF
.
For a given f-stop you can find the
hyperfocal distance
.  Again find the two f-stop markings in the DOF scale.  Set one at infinity (INF).  The focusing pointer points to the hyperfocal distance.
By definition, hyperfocal distance is the distance at which infinity is in acceptably good focus.  The near DOF distance is equal to half the hyperfocal distance (you can verify this by looking at the distance pointed by the other DOF marking)
You can use this DOF scale to replace a damaged DOF scale or lug holder.  A tip: You can use the right hand lug strap holder on the left side and install the DOF scale on the right side.
A trick I learned from
Charles Piper
:  You can use the DOF scale to figure out the
acceptable depth range
for a given focusing distance.  For this purpose just use the f8 (liberal) or f5.6 marks of the DOF scale.  For example, if the near object is at 5 feet, the f5.6 marks of the DOF scale point to 10 feet.  You should restrict the depth range in the scene between 5 and 10 feet (this is the conservative estimate; the liberal estimate obtained at f8 is 18 feet).
Note: This depth range recommendation is independent of the f-stop used in the camera.
More explanations and details are found in my Stereo Realist book
(for sale in my ebay auctions)
I welcome bids outside of the USA!
Please see my other auctions for more stereo photography items:
http://stores.ebay.com/DrT-3d
The fine print:
Please use eBay' s
checkout
and go ahead with an electronic payment after the auction is over (
please make one payment for combined purchases
) or wait for me to send you an invoice.  I would like to hear from you within 3 days from the day the invoice was issued .  I acknowledge all paypal payments.  Make sure that your paypal email is working and not going to a "Spam" folder.
I use the US Postal Service or FedEx, I will
ship anywhere in the world
and I try to get you the lowest shipping rates.  I will combine shipments too.   For international customers, I am flexible in custom form declarations.  Expect to receive an email from stamps.com to your paypal/ebay email when your package is shipped.  This is a delivery confirmation and not tracking.
If you have a problem with your purchase, please let me know as soon as possible (remember, I sell a lot of items on commission and I need to close these accounts).
Contact me
before leaving non-positive feedback (including neutral)
or anything less than 5 star rating
.  I will do my best to resolve any problems.
I accept returns
for most of the items that I sell, but I can only refund the selling price, not shipping, unless if there is an error in the listing. I always leave
positive feedback
.
I appreciate your business
and I hope to see you back!
** DrT knows 3D **
I have been taking stereo pictures since 1988 and into the business since 1994 and I have
plenty of satisfied customers
. I specialize in
stereo education
through books, lectures, videos, CDs,
Stereo Realist camera repair
,
stereo viewer repair
,
stereo photography supplies, and commission sales of photographic items.