8mm Forum: Elmo's green lens

»	8mm Forum » 8mm Forum » Elmo's green lens

UBBFriend: Email this page to someone!

Author

Topic: Elmo's green lens

Paul Adsett
Film God

Posts: 5003
From: USA
Registered: Jun 2003

posted October 28, 2008 10:39 AM

Last night I did another side-by-side brightness test of my GS versus my Eumig 938. The GS was fitted with the Elmo f1.0 12.5 -30mm lens, and the Eumig was fitted with the Kodak Ektar f1.0 non-zoom lens. With the GS set at the low lamp setting, the brightness was about the same. At the high lamp setting, the GS beat out the Eumig on brightness, but the Eumig had a much whiter light because the Elmo has a definite greenish tint to it!
I tried a new bulb in the Elmo and still got that greenish tint, which I have to attribute to the Elmo lens. It's not noticeable by itself, but when you do a side-by-side test with another projector, it really stands out. Has anybody else noticed this, or is it just my particular Elmo lens?
In terms of picture quality, the Eumig with the Ektar totally beat out the GS, with the Eumig having astonishing resolution and contrast, with lush vivid colors and shimmering grain from corner to corner. In comparison, the GS picture while very good, is definately sub-par with noticeably less contrast and softer focus.
I've got to find a way to get that Ektar into a GS1200!

--------------------
The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,
Elmo GS1200 f1.0 2-blade
Eumig S938 Stereo f1.0 Ektar
Panasonic PT-AE4000U digital pj

| IP: Logged

Maurizio Di Cintio
Jedi Master Film Handler

Posts: 977
From: Ortona, Italy
Registered: Jan 2004

posted October 28, 2008 02:30 PM

Mmm. Perhaps prime lenses are simply not comparable to zoom lenses, especially with such high apertures?...

--------------------
Maurizio

| IP: Logged

Mike Tynus
Expert Film Handler

Posts: 135
From: Addison, IL, USA
Registered: Apr 2008

posted October 28, 2008 02:40 PM

Paul, I don't see any green in my 1.0 lens.

BTW, I recently read your post about changing the S938 to 110 volts and I must say that there is a nice boost in the bulb brightness. Are you still doing this without any adverse effects?

| IP: Logged

Graham Ritchie
Film God

Posts: 4001
From: New Zealand
Registered: Feb 2006

posted October 28, 2008 02:50 PM

Hi Paul
I dont have a Elmo1.0 lens and never noticed a greenish tint with the Elmo1.1. Paul did you try another Elmo lens say eg the standard 1.3 to see if you got the same results, what make and type of lamps used in both projectors and when you swapped the one in GS1200 was the lamp from the same manufacturer? fitting your non-zoom Ektar onto the GS1200 would be the way to go for picture quality, is it possible?

Graham.

| IP: Logged

Tony Milman
Phenomenal Film Handler

Posts: 1336
From: United Kingdom
Registered: Jun 2003

posted October 28, 2008 03:34 PM

Hi Paul,
Not noticed a tint though comparing the schneider to the elmo I do notice the Elmo to be warmer- more yellow

--------------------
Tony

| IP: Logged

Douglas Meltzer
Moderator

Posts: 4554
From: New York, NY, USA
Registered: Jun 2003

posted October 28, 2008 03:55 PM

Paul,

I'll have to set up a few projectors and do a comparison. For a moment there I thought this thread was about a new Sesame Street show.

Doug

--------------------
I think there's room for just one more film.....

| IP: Logged

Paul Adsett
Film God

Posts: 5003
From: USA
Registered: Jun 2003

posted October 28, 2008 04:17 PM

Mike - yes I am running my 938 at 110v transformer setting. It's been that way for several months now, with no ill effects at all. The lamp is considerably brighter and whiter and now runs much closer to its correct 15 volts.

Graham - yes I have now succeeded in getting the Ektar into the GS1200, after working on it all day today. It now focuses very well. I will be running some tests this evening and I will report on the results in the next day or so.

Doug - 'Elmo's Green Lens' DVD is now on sale at Blockbuster at $14.95 [Big Grin]

--------------------
The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,
Elmo GS1200 f1.0 2-blade
Eumig S938 Stereo f1.0 Ektar
Panasonic PT-AE4000U digital pj

| IP: Logged

All times are Central

Printer-friendly view of this topic

UBB.classic^TM 6.3.1.2