I bought a second hand Gossen Lunasix 3 lightmeter as a replacement for my other Lunasix 3, which ISO setting dial got broken and can only be shifted in one direction not a big issue, but anyway I wanted a backup lightmeter. However, when I tried the new second hand Lunasix lightmeter I discovered that values are constantly approximately one light value higher than the old Lunasix one. And this seems to be constant. I made several tests and I even used the same batteries, as I wondered that the problem might be related to different battery state.

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Share This Page. Thread Tools. Jan 2, 1. Messages: I would prefer to use, what here in the UK, is called a PX14 adapter that takes two silver oxide cells, as this would be the cheaper route. The problem is no one seems to stock or sell it any more. So the only option appears to be using two MR9 adapters, one for each battery.

I have found the MR9 cheaper on ebay, but not the PX I have read of a procedure to add diode into the wiring of the meter, but that is beyond me.

Jan 2, 2. Messages: 9, Use another brand of Zink battery. In the States Zink batteries are the least expensive button cells. I buy them in bulk. Jan 2, 3. Messages: 6, Use zinc-air cells and block off all but one of the airholes, this increases the life to a year or more. I made sone rings of 14 AWG copper wire to hold them centered. Jan 2, 4. George Milton advised that he could recalibrate the meter to use alkaline batteries, but advised against it.

He recommended using the zinc-air cells as being "the perfect solution". Jan 2, 5. Messages: 1, Yes, the hearing aid zinc-air cells are inexpensive and the tip on covering most of the air holes is a good one-- but I am lazy, and I like things to fit just right. So I bought some MR9 adapters. I have so many devices that use the mercury cell that it's worth it to me.

Jan 3, 6. Thank you all for your replies. Jan 3, 7. I have the PX14 from the small battery company for my Lunasix. Works perfectly, meter is accurate, and it's still using the first set of batteries after 18 months. I have no reservations about recommending it. Jan 3, 8. Thank you Tobes71, it's the way I'll try and go. Jan 3, 9. Messages: 5, Jan 4, Thank you Dan. It looks a very in depth read. I've been told that the PX14 adapter is no longer made by Gossen, what I'll probably do is get two MR9 adapters instead.

Jan 5, Seems like a quality product. I do not know how you can ever adjust any light meter to work with alkaline batteries because their voltage drops off as they age. The almost constant 1. Like some others above, I recommend the zinc-air cells. Only uncover one hole on the top. In USA, they are cheap for a 6-package at the grocery store. Good luck with your meter.. You must log in or sign up to reply here.

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Calibrating Gossen Lunasix 3 (LunaPro)

About this item Details About this item. Item description Details Seller's description. Sell One Like This. Gossen Lunasix 3 Light Meter Roberts Camera - Photo Industry Leader since !

LTH209 - 01 PDF

Two Gossen Lunasix 3 Lightmeters with different values - which one is correct?

Here are all the pages of the operating manual for the Gossen Lunasix 3 photographic light meter. Lunasix light meters are also labelled Luna-Pro in some parts of the World. You can read the pages one by one from the links below, or get the whole manual in pdf format you will need Acrobat Reader. Micro attachment The Lunasix meter can be used for photo-microscopy, by using the accessory Micro Attachment to fit the meter to a microscope. I'm grateful to Rob Cole for sending me a pdf copy of the instruction leaflet for the attachment. The Lunasix and Luna-pro meters are designed to use a pair of mercury cells.

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