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It minimises the effects of stray light and thus can improve contrast and provide a darker background - according to my internet search on the subject. My MN190 is heavily baffled and seems to exhibit those benefits. I would suggest that is a plus for the tube but i don't know how that is duplicated in the truss models.
PS, one thing I have discovered about shrouds is that they can allow light through if it hits it at the right angle. I was getting red casts to images taken on my truss newt at certain attitudes at the dark site - tuned out to be people walking by with red led headlights on. Tubes don't allow light through obviously. The quality of the shroud, material used, etc could negate any difference I suppose. I'll defer to the shroud experts, but my theory is that the stretch shrouds open up the weave of the lycra like material creating pores for light to enter at 90 degrees to the fabric.
Last edited by glend; 17-07-2015 at 07:45 PM.
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