nehemiahphoto wrote: Abuttolph wrote:
I purchased a new Thypoch Eureka 50mm f2 lens earlier this month. Today was my first opportunity to take it out and I discovered that it does not seem to be able to produce sharpness at all in the central 2/3 of the frame at and near infinity. I also noticed that, while the spots that I focused on were not sharp, some areas behind that were a little sharper and some areas on the edges and closer were somewhat sharp. Super weird. It is being sent back.
Really seems that they are having some QC issues, at least with the non-Simera line.
Did you try a controller test with live view and a decentering test?
I did not test using a test chart or brick wall type of evaluation. However, I shot several images in a few different scenes. I focused using the rangefinder, a few tests with the lens in the infinity position, and using the Visoflex. In all cases, there were enough things (trees) in the scenes to see what was happening with the focus. There was not a single image in which the spot that I focused on was sharp. Actually, the only places that approached being almost acceptably sharp were on the outer parts of the frame and were closer to the camera than the focus point. In some images, nothing at all was in focus.
The problem seems worse than decentering as not one single image was sharp anywhere in the central area of the frame. I suspect that one of the lens elements is defective.
Hi Abuttolph,
That's why in my post above, i said i thought it was me ... I wasn't getting anything sharp in center. You are right it's more than decentered. Since I got from Bh Photo it was simple to return immediately.
Oh, and this was not rangefinder focused. It was on the Leica evi.
Joe D
Your experience mirrors mine very well. I too thought it might have been me at first and then took another round of shots after the first batch in which I made sure to use various focusing methods and the infinity lock. B&H is indeed terrific for returns. It is too bad that Typoch is having such QC issues. Hopefully, they can get things straightened out reasonably soon.
Additional note: I went back and re-looked at images that I shot with the Eureka 50 yesterday. The areas of the frame that are sharpest are definitely inconsistent in position within the frame. Sometimes, the sharpest is on the outer left and right, other times on one side or another - never where I focused. This is making me wonder if there is some play in the alignment of the lens when it is extended and locked. When extended and not locked, it is pretty easy to tilt the extended shaft of the lens a little bit. It might be that lens never gets aligned quite right when it gets locked down, causing the inconsistencies. Perhaps there is more than one problem - alignment and element defect?
nehemiahphoto wrote: Abuttolph wrote:
I purchased a new Thypoch Eureka 50mm f2 lens earlier this month. Today was my first opportunity to take it out and I discovered that it does not seem to be able to produce sharpness at all in the central 2/3 of the frame at and near infinity. I also noticed that, while the spots that I focused on were not sharp, some areas behind that were a little sharper and some areas on the edges and closer were somewhat sharp. Super weird. It is being sent back.
Really seems that they are having some QC issues, at least with the non-Simera line.
Did you try a controller test with live view and a decentering test?
I did not test using a test chart or brick wall type of evaluation. However, I shot several images in a few different scenes. I focused using the rangefinder, a few tests with the lens in the infinity position, and using the Visoflex. In all cases, there were enough things (trees) in the scenes to see what was happening with the focus. There was not a single image in which the spot that I focused on was sharp. Actually, the only places that approached being almost acceptably sharp were on the outer parts of the frame and were closer to the camera than the focus point. In some images, nothing at all was in focus.
The problem seems worse than decentering as not one single image was sharp anywhere in the central area of the frame. I suspect that one of the lens elements is defective.
Hi Abuttolph,
That's why in my post above, i said i thought it was me ... I wasn't getting anything sharp in center. You are right it's more than decentered. Since I got from Bh Photo it was simple to return immediately.
Oh, and this was not rangefinder focused. It was on the Leica evi.
Joe D
Your experience mirrors mine very well. I too thought it might have been me at first and then took another round of shots after the first batch in which I made sure to use various focusing methods and the infinity lock. B&H is indeed terrific for returns. It is too bad that they are having such QC issues. Hopefully, they can get things straightened out reasonably soon.
Additional note: I went back and re-looked at images that I shot with the Eureka 50 yesterday. The areas of the frame that are sharpest are definitely inconsistent in position within the frame. Sometimes, the sharpest is on the outer left and right, other times on one side or another - never where I focused. This is making me wonder if there is some play in the alignment of the lens when it is extended and locked. When extended and not locked, it is pretty easy to tilt the extended shaft of the lens a little bit. It might be that lens never gets aligned quite right when it gets locked down, causing the inconsistencies. Perhaps there is more than one problem - alignment and element defect?
