Go Back   Rangefinderforum.com > Cameras / Gear / Photography > Gearhead Delights > Photo Accessories / Bags/ Meters / Tripods etc

Photo Accessories / Bags/ Meters / Tripods etc A place to discuss the delights of photo accessories, including bags, meters, tripods, filters, straps, camera cases, lens hoods, anything non digital that can make your gearhead life a little bit more enjoyable.

Reply
 
Thread Tools Search this Thread Display Modes

Sverdlovsk 4, calibration issue
Old 02-14-2017   #1
semjueels
Registered User
 
semjueels is offline
Join Date: Nov 2016
Posts: 1
Sverdlovsk 4, calibration issue

hello RFF,

here's a question regarding calibration of a Sverdlovsk - 4 meter. any tips or suggestions will be greatly appreciated (i have checked the previous posts on RFF regarding this meter, but didn't find anyone dealing with the same topic)

i bought the meter in a NOS condition a couple of months ago. in general it seems to be working - it's readings comply with results from a meter app on an iPhone (although they don't comply with readings of my OM-1n, please see below)

what makes me doubtful about the device is that when trying to calibrate it (according to the directions in it's manual from a.klomp's page), instead of the LED going off at the combination of 1/250 & f/8 (as it should according to the manual), then the dial has to be rolled all the way till about 8" mark for the LED to extinguish, which seems a way too large difference to be neglected. i have tried various battery combinations - 3 x LR44, SAFT LS14250. all give the same results.


the idea is to use this meter with a Lubitel camera that doesn't have a meter. up till now i have been metering for the Lubitel through an OM-1n, which gives good results but is not at all handy. in comparison, when metering for Lubitel with the Sverdlovsk, the readings tend to give underexposed results.


one of the quickest ways of course would be to just check the difference between Sverdlovsk's results and those of OM and always adjust the results accordingly, but that seems a bit awkward - one doesn't wand a meeter to constantly readjust it's results. by it's appearance and also in accordance to quite many of the satisfied reviews it has got, this seems to be a very usable device. so, i'd be very happy to get it properly going.


excuses, if this appears like an all-over-the-place post. as mentioned at the top - any hints towards a solution will be greatly appreciated.

greetings,
semjueels
  Reply With Quote

Old 03-20-2017   #2
Spyderman
Ondrej P.
 
Spyderman's Avatar
 
Spyderman is offline
Join Date: Apr 2006
Location: Bratislava, Slovakia
Age: 33
Posts: 1,369
Try this http://www.temnakomora.cz/page/index...rdlovsku-4-r84

It's in czech, but try to run it through google translate.

I recently calibrated a Sverdlovsk-2 and it uses only 2 trimmers for the metering (no battery check calibration). If the function of converting light to LED switching voltage is V = a + b*EV, then the 2 trimmers in Sverdlovsk-2 are the 2 constants 'a' and 'b'. 'a' controls constant offset (most significant in low light), and 'b' controls the function steepness, however changing one always affects the other.
__________________
Ondrej [on-the-ray]
My Flickr

  Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 01:11.


vBulletin skin developed by: eXtremepixels
Powered by vBulletin® Version 3.6.8
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

All content on this site is Copyright Protected and owned by its respective owner. You may link to content on this site but you may not reproduce any of it in whole or part without written consent from its owner.