I * 200mm F2.8 ED [IF] SDM tried it successfully on a Pentax DA and have to say that this combination should be distinguished in aperture 16 as a result of a "real" macro lens barely. For larger aperture but it's also not a disaster, the CA remain within the limits and the distortion can be neglected (APS-C).
It's more the extremely shallow depth of field, the power to create one, and therefore you will work anyway mostly with very small aperture at the telephoto macro range (must). Autofocus (PD and CD tested) works very well at the K-3. But you should not even try to take a picture without a tripod. The SR (image stabilizer) can be forgotten anyway, because you're not only in the plane "wobble", but also more easily back and forth swings. In this direction, only a very fast autofocus permanent could bring something there but not there.
At a distance of 68cm between the object and the sensor level (white line with circle on the camera body), the 200mm lens is already very close to the infinity stop, so that only a little game to focus remains. The image width is then 61,5mm (APS-C). The shortest distance is about 51,5cm. Since the focusing ring shows the 200mm lens at 1.2m and is almost at the stop. Here, the image width is 38mm. So you move in a very small area. The profit of this combination is the greater distance to the object. For the same magnification (1.6) I have the 100mm macro lens only 34cm distance to the sensor plane. With the hood is attached but the 100mm macro lens to 6.3cm shorter than the 200mm lens, so that the maximum magnification of the distance profit for creatures that are sensitive to objects in their vicinity, shrinks to about 11cm (51,5-34-6,3 ).
Conclusion: does not cost much and expands the possibilities. According to Supplement the best use of the close-up lens with 77mm diameter is given with focal lengths from 70 to 300mm.
And do not forget: if you have a protector or a UV filter to protect the front lens attached, you should runterschrauben him previously.
