Some of us have already reported on the optical quality of the new PhaseOne 45mm TS lens: the center is sharp enough, the left side of a photo almost blurred, while the right side is unsharp. Below follows the comment from PhaseOne which received via my dealer. To be honest this is not what I expected as I find the lens almost unusable, in particular for interior photography. None of this was mentioned when I ordered my copy as part of an offer in September (PhaseOne camera, P45+, 120 mm, 80 mm, 45 mmTS). I have not yet spoken to my dealer, but I am curious to have their opinion.
we have evaluated the images and also comparred against the factory images we have made with the same lens here in our studio before shipping. Product Marketing and our highly estimated lens specialist have tested this partiquelar lens and comparred the images from the user with special attention.
Looking at the 3 images and also our test images made at f 3.5 - we find that they are all sharp in the middle on most f-stop's. The images from the user shows good overall sharpness in the middle which is also expected. Then when evaluating the images and lens getting closer to the edges - the charistichs of this lens is seen and also where the lens has it's strong points and also where the limitations starts.
The lens is very good at close up photography, tabletop, packshots etc. This is also seen in the samles shown in the small samplefolder that have been distributed with the lens. The lens can also be used shooting objects at longer distances however you will see the charistichs of the lens showing a fall of in sharpness on the edges. This is a known charistichs of this partiquelar lens and has never been stated as a strong point of this lens. The lens charistichs is very good at closer distances and some cropping needs to be added at longer distances - this is what can be achieved from this lens.
If the user needs to shoot at longer distances, location or landscape we recommend to use the Cambo or Horsemann with a Schneider lens or largeformat with digital lenses for wide angle. However the 45 T/S lens has it strong point a closer distances. F-stop from 8-16 is recommend to give the overall best results as stated in the marketing material and brochure.
Based on this we consider this lens to be within the specifications when used at the recommended set-up and f-stop's.
Thanks for your feedback. We kindly ask you to transfer the information to the enduser and let him know under what circumstanses he get's the best performance of this lens.
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I have attached two screenprints to show you what I am talking about. The shot was taken at f/11.