[Alt-photo] UV exposure meter: answer from Ian Parker, lightmeasure.com

Philippe Ayral payral at gmail.com
Wed Sep 6 08:56:20 UTC 2017

I confirm by mail my wish to buy that meter directly to Ian.
Thanks for making that possible.

*Philippe Ayral* *Photographie*
52, rue de Vallard - 74240 Gaillard
Tél: 04 50 39 79 81

2017-09-06 9:42 GMT+02:00 Kees Brandenburg via Alt-photo-process-list <
alt-photo-process-list at lists.altphotolist.org>:

> Dear list,
> This week I have contacted Ian Parker and asked him if he was willing to:
> • produce and ship a number of pre-ordered meters
> • open source the design
> Here is Ian’s answer and it’s good news!
> I will now collect the list of interested buyers form the thread(s) here
> and send them to Ian. New buyers can contact Ian directly:
> info.lightmeasure at gmail.com. The new meters will be long wavelenth with
> external sensor only and the prize will be $299. Production lead will be
> 4-6 weeks.
> Kees
> ================
> Hello Kees,
> How very nice to hear from you and thank you for the explanation. I
> actually suspected there might be an active thread on a list somewhere
> since I have, indeed, received several recent inquiries about the meters.
> You asked a couple of question in your email:
> 1) Would I consider open-sourcing the design? There are a few challenging
> technical steps in building the meters, which might make this approach
> unfeasible for some artists. The hardest is fabricating the UV filter with
> the correct characteristics so the meter will measure only the range of UV
> wavelengths that our plates/papers/materials respond to but not other
> wavelengths (including visible light). This is pretty tricky to do without
> the proper tools. I had to custom design a combination of 4 filters to
> achieve this and it required access to specialized optical instruments to
> measure their optical transmission - tools which most artists/photographers
> would not have ready access to.
> 2) Would I consider a custom order for more meters? The answer to this is
> probably yes - assuming I could get a commitment from a sufficient number
> of customers, and with a few caveats:
> i) Since I have significantly depleted my existing inventory I would need
> to restock on many components, and would therefore need a commitment for at
> least 40 orders to make this viable.
> ii) Also I will need to increase the price (!) - sorry about that but the
> previous price point of $220 really doesn't work without volume of scale
> (which is the reason that we closed the store in the first place). I'll
> need to set the price at $299. I realize this might be a problem for many
> people, but it's an unfortunate fact. Again, sorry.
> iii) Since I will need to reorder much of the inventory there will be an
> inevitable delay of 4-6 weeks before I could ship. One of the major
> components has a 4 week lead time.
> iv) To keep things manageable I'll probably only offer the PPM-2 long
> wavelength version (with the external sensor). This was, by far, our most
> popular version, and I expect that most people would order this anyway.
> So how to proceed? Might I suggest that you circulate this to the
> alt-list, and ask people to contact me at the following email address if
> interested? If I receive enough responses I'll reopen the store and start
> accepting orders.
> contact at:  info.lightmeasure at gmail.com.
> Thanks Kees, it was nice talking with you again.
> Best regards,
> Ian
> www.LightMeasure.com
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