• Members 1376 posts
    March 20, 2026, 7:07 p.m.

    I seem to gaining a collection of batteryless Exposure Light-meters. Sekonics appear to hold their sensitivity much better than Weston models.

    Here it is:

    Sekonic Auto-Lumi.jpg

    Notice that there is no scale on the meter, unlike foot-candles on other models. You turn the circular scale until the cursor thingy in the meter window lines up with the needle. So ... what is the foot-candles for a given circular scale position??

    From the image above for example, it is recommending f/2.8 at 1/60 sec at ISO 100 - equivalent to about 83 foot‑candles, says you-know-who ...

    Sekonic Auto-Lumi.jpg

    JPG, 665.3 KB, uploaded by xpatUSA on March 20, 2026.

  • March 20, 2026, 7:11 p.m.

    Cool gadget :)

    Did you compare it to other [camera or battery-powered] meters - how much it errs?

  • Members 1376 posts
    March 20, 2026, 7:59 p.m.

    Not yet. My reference device is a new BTMETER model BT-5000A, accuracy +/- 4% of reading in my range of interest 0-929 fc (0-10000 lux).

    I don't have any battery-powered exposure meters. Sold my Gossen StarLite (?) long ago.

  • Members 1376 posts
    March 21, 2026, 8:53 p.m.

    Ho ho ho !!!!!!!!!!!!!!

    Sekonic still makes the battery-less L-398A model which, unlike all previous battery-less models, has an amorphous silicon light sensor and which will last a lot longer than me. Normally around $250 online - but today I spotted one for $90 being sold with an older model manual and accessories. Just had to order it.

  • edit

    Thread title has been changed from My Latest Lightmeter.