Travis, unfortunately the figure I had given cannot get backed up through Pentax's website. It was some information about lenses my instructor had given me sheet in a recreational photography class I took last year. I especially remember it being an exciting fact being a pentax owner. Anyways, I did a google search as 'pentax 98% light transmission' and it brought several links up. Didnt look too far but found this and several others like it. Not that you would be familiar with it, but he owns two stores, Castle Photo, so I gave him some credibility. He was a Nikon guy himself, but admitted to pentax having the best lenses. He said minolta or someone else had lenses that transmitted the same percentage as well, only remember pentax since i am an owner.
http://www.telescopeshop.co.uk/en-gb/dept_160.html
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