Optic Explorer contacted me about their new lens simulator/lens database website (http://www.opticexplorer.com). You can use this web application to simulate the characteristics and performance of many lenses. There’s also a sizable database of existing lens designs that can be searched for and simulated. You can explore the lens database and tinker with lenses, light sources etc. without logging in or creating an account. If you want to create your own library of lens designs, you can create an account to store and share your designs. In either case, it’s free to use.
The Pentax lens selection can be found here.
Here are a few more screenshots:
Via NikonRumors
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