Da lil ally 7" lilliput project

[I_eat_flowers]

This is what I’ve made from the lilliput 7” VGA.

“Ingredients”
Bulb: 150 W HTI, Socket GY 9,5
Ballast: magnetic w. accordingly ignitor
Lens: FL 280-320 mm (11-12 ½ “) varifocus
Fresnel : 2x 7,87 ‘’ , FL 2x 8 ¼ ‘’
Condensor : dia. 3 ½ “
Reflector: dia. 2 1/8 “
UV-Shield: 3 ½ x 3 ½ x ¼ “
Surface Mirror: approx 5 x 7”
Enclosure: Ally, MDF
Dimensions: H 5.9 ‘’ x L 16 ½ ‘’ x D 9 ½ ‘’
Total costs: around 420 Euro ( approx. 500 bucks)


pj’s
throw distance: 3,5 m = 11,5 ft
screen: black out roller blind from home depot, size (width 1,6m= 5 1/4 ft, long 1,8 m = approx 6ft)
screen diagonal: 2m = 6 1/2 ft)

pics taken w/o tripod. i haven't work on the pics but minimize them to 800x600.
the darker area comes from a splintered pyrex-glass. it was tightened w a screw became hot so it cracks and the foil between got a brownish color. i'll replace.
real colors are better than it appear on the pics. crappy cam ….

[Motoko]

That's a nice setup, how much did the surface mirror cost?

[I_eat_flowers]

thank ya buddy. :-)
the mirror was 22 Euro incl. shipping. haven't got a clue what it'd be in GBP.

[nmd_sb]

nice job,
i know you said the camera sucks and theres a crack, but is it brighter than what the pic is showing?

[I_eat_flowers]

Originally posted by nmd_sb
nice job,
i know you said the camera sucks and theres a crack, but is it brighter than what the pic is showing?

thx. :-)
yeah, it's far brighter than it seems.
even so on a dull sky or inna dawn i can sit and watch.
i think ist's comparable w the pj's from t 800.

[womble]

Wow Great pictures.

I've been lurking for a bit trying to understand how it all fits together. But It's difficult to get MHbulbs in the UK.

Can I just ask where you got the MH bulbs & starter from

Thanks

[I_eat_flowers]

heya womble,

thx too.

source for MH bulbs in the UK is http://www.internationallamps.co.uk/. They gottem all as well as the control gear.

I bought my stuff here:
lamp: www.rockshop.de
ballast+ignitor: www.marinshop.de ( shop is temprly. n/a)

hope that helps.

[Motoko]

can i ask, what lens are using? can you focus the image from just the lens? im going to make a lil' PJ like yours and im still inquiting on what lens to use that can be adjusted to make the image focused.

[I_eat_flowers]

Originally posted by Motoko
can i ask, what lens are using? can you focus the image from just the lens? im going to make a lil' PJ like yours and im still inquiting on what lens to use that can be adjusted to make the image focused.

lens is a 285-335 mm varifocus triplet i bought here http://www.exclusiv-online.com/shop/...g=USD&whrg=EUR

it's a complete kit containing lens, fresnel, condensor and reflector.
cost 64 Euro plus shipping. it lasts one week until i got it.

[I_eat_flowers]

a small update. I've built a zoom-objective from two bass-reflex-tubes. it works great.
the throw distance is now 4 m (13 ft). At 4:3 ratio the diagonal is then 2m ( 6 1/2 ft) at FL 330mm( 13").





A small sketch ( all in metrics) .