- Use the flash on my Pentax K-30th - Can be bombproof secure with large screw. - Use only the auto zoom function that is perfectly adequate for not too serious photographers and almost always produces good pictures. - Optimal for bounce flash, where the light generated by rotating the flash head upwards through the ceiling, good images. - Swinging the flash head is even with one hand easily. - Battery compartment bit fiddly, but still acceptable. - Device already quite large, but that has to be so well at this enormous intensity. - Overall: Very good to bebrauchen for the average photographer.