I'm looking for a really big objective to achive a really big throw (5m (+- 15'). Now i was thinking of the 135mm triplet, but after some reading i found out that this lens had some disadvantages with 15" lcd panels.
Now i found this objective: MTD 70MM DIA OBJECTIVE, 800MM FL
And was wondering if anyone used this one before.
Downside of this objective is that the diameter is only 70mm, upside is that it only costs 19 bucks and that the focal length is 800mm.
Is there anyone who would advice me to use this objective for a throw of 5 meters?
Now i found this objective: MTD 70MM DIA OBJECTIVE, 800MM FL
And was wondering if anyone used this one before.
Downside of this objective is that the diameter is only 70mm, upside is that it only costs 19 bucks and that the focal length is 800mm.
Is there anyone who would advice me to use this objective for a throw of 5 meters?
this lens and a 15" at 5 meters trhow would give you near 80" diagonal image. But as you said, the diameter is the problem on that lens.
Hi Rox,
thanks for your reply!
I do realize that the diameter is way smaller then the 137mm one, but i'm also planning to use a 400w HQI lamp instead of my previous 400w halogen lamp. I hope that to compensate the smaller diameter.
But what i'm curious about is the fact that the MTD objective is a double one, and not a triplet. Has this a real noticable negative effect on my projection?
thanks for your reply!
I do realize that the diameter is way smaller then the 137mm one, but i'm also planning to use a 400w HQI lamp instead of my previous 400w halogen lamp. I hope that to compensate the smaller diameter.
But what i'm curious about is the fact that the MTD objective is a double one, and not a triplet. Has this a real noticable negative effect on my projection?
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