Rear Converter for K Mount DSLR Camera HD PENTAX-DA AF REAR CONVERTER 1.4X AWAchieves AF compatible with master lenses and dust-proof and splash-proof construction.1. Telephoto effect with 1.4x focal lengthBy attaching it between the body and the lens, the effect of magnifying the focal length of the master lens by 1.4 times Small and lightweight design with a thickness of only 0.8 inches (20 mm) to easily expand the shooting area. The master lens also increases the focal length as it is, so you can get a close-up effect when shooting close-up in close proximity.2. Compatible with the first AF Pentax Rear ConverterIn combination with AF lens, AF can be used on the master lens side. The AF system supports both in-lens motor drive (SDM, DC) and in-body motor drives. Compatible with K-3, K-50, K-30, K-5 II, K-5 II s, K-5, K-01, K-7, K-r. The AF function is also compatible with lenses with a synthetic F value up to F5.6.3. Dust-proof and splash-proof construction that is safe for outdoor use.This is our first 3-part rear converter with dust and splash-proof construction. The dust-proof and splash-proof body and lens allow you to shoot with confidence even in rainy weather and outdoor environments where dust and dirt are dily.4. Excellent optical performanceWith the latest optical design, it has good optical performance, you can enjoy shooting with the performance of master lenses. In addition, our proprietary high performance multi-coating "HD Coating", which reduces reflections inside the lens and effectively reduces ghosting and flares during harsh shooting conditions such as backlight and other light conditions, providing high contrast and clear viewing.