The CED 2 with the IR screens is a pretty good compromise.Smaller( still sits on a tripod) and cheraper than the oelher, not as good but with 2 foot sensor spacing and IR Iv found it to be pretty acurate.The IR screens take out the varience you get with light change.Its not an Oehler but its a good step up from the shooting chroneys if thats what your looking for.
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