Have a excellent 15mm Televue or a 20mm TeleVue Plossl or an 2X Televue Barlow for trade towards a 25mm Televue plossl. The details can be worked out on what one equals how much money towards the 25mm plossl but for my new Denkemier binoviewer I need the 25mm plossl. I'll purchase the plossl outright for about $60.00 give or take a little if you want. Any help with this will be appreicated. Please let the 25mm Televue plossl be a "Japan" with the eyeguard. Thanks for reading all this. I will answer all inquires.