Pherdinand said:
nice, stephen...so...tell us the details!!! What did you use to make and scan? Who is she? What's her phone number? 😉
Her name is Mellisa. She is waiting for your phone call at 617-555-1212. She lives in the Netherlands.
Actually, I don't know who she is. These were sample images of the Phase One P25 digital back for medium format cameras. It was taken on a Mamiya 645 AFD with 35mm 2.8 and 80mm 2.8 lenses. The Phase One P25 is built using the Kodak 22mp full frame 6x6 sensor. The image size was about 70mb for the samples above.
It was posted to show the differences in a compressed jpeg vs a smaller crop from the same original. I would suggest that if we want to compare two lenses, we have a better chance if we scan them at high resolution, zoom in to 100%, then take a small crop from that area for comparison sake. Its still not the best way, but its better then trying to compare the entire image which will so significant softness overall.
I can come up with some reasonable specs for size, resolution, etc, to use in a comparison situation if anyone cares. At least well get a better idea on a lens sharpness than using the whole image.
I am blown away with the quality of a 22megapixel digital image. I can't see taking a similar crop from a 35mm negative and retaining that level of sharpness and quality as shown above. Seems that digital has surpassed 35mm film resolution if you use a 22megapixel medium format back. However, the ante to the poker table is about $20K. How many years before the same equipment is available at $3k based on the present rate? I may be going all digital by that time!
I've got a 50mm 1.5 Nokton coming. I'd be glad to shoot some images, scan then and use them for comparison against other lenses. In fact, I'd do that with any of the lenses I have. Maybe a new tread for lens comparisons with some looses guidelines to keep the samples apples to apples. Yes, no?