user777
Member
- Joined
- Jan 29, 2019
- Messages
- 44
- Reaction score
- 6
- Location
- Finland
- Country
- Finland
- Dash Cam
- GitUp Git2P
Hi all
Up until recently I've been very happy with my Git2P camera. The videos are razor sharp, the images likewise... The only thing somewhat bothering me was the 170 degree FOV with its very significant fisheye distortion.
So after seeing that GitUp started offering 90 degree FOV lenses without distortion I was very happy about it. I read up on the topic, I saw the relevant lens swap video on Youtube and after reading several threads on recommendations I decided to go with the f2.8 4.1mm lens which I purchased directly from the official GitUp webstore.
I had seen several such 90 deg lenses on other sites (ebay, Amazon etc) but I decided to play it safe and get the authentic lens straight from GitUp.
The lens came very quickly and just some days ago I finally found the time to do the swap.
I followed all the instructions carefully, disassembled the camera, removed the base with the 170 deg lens from the sensor and went ahead to install the 90 deg lens.
Much to my surprise, the new lens' base just wouldn't fit!
The distance between the two mounting holes is a couple of mm less than the original base! No matter how I tried, it would just not fit properly!
After comparing the two bases, I discovered that the tabs on either side of the 90 degree base are slightly shorter than the 170 version.
So after some thinking I put back the original base and decided to just unscrew the 170 degree lens and put the 90 degree one in its place. This worked perfectly, so I reassembled everything and started focusing the camera. After careful calibration with a chart I thought I was ready. Or so I thought...
I took some test videos and pics and when I pulled them up on my PC I was shocked to see how bad the image quality was! While the center of the lens was tack sharp both the left side as well as the right side were a total mess! Completely smudged and blurred. It is so bad that it almost looks like those diorama effects on some cameras where the sides of the photos are smudged to simulate a very shallow DOF.
Here is an example:
90 deg lens image sample
The same story continued with the video modes. Regardless of resolution the sides of the picture remained very badly blurred. Interestingly, if you examine the sample pics you can see some blurring on the top side of the center of the lens.
I thought that maybe the base was not seated properly after removing it. So before taking apart the camera again I decided to try the 170 degree lens to see what happens. If the base was to blame then it should have the same badly smudged areas. However, after focusing the lens and taking a few sample pics/videos everything seemed to be very sharp. (Please note that I had put both contrast and sharpness to maximum in order to help with the focusing)
170 deg lens image sample
So my question to you is, now what?
Did I get a badly decentered lens? Is the 4.1 lens incompatible with the Panasonic sensor of the Git2P? There is no such indication on the GitUp website.
How can I contact the company and return the lens? I know that they reply on the threads here occasionally so it would be very nice to hear from them how we could proceed. In the meantime, and ideas and/or suggestions would be most helpful!
Thanks a lot and apologies for the long message!
Cheers
Nick
Up until recently I've been very happy with my Git2P camera. The videos are razor sharp, the images likewise... The only thing somewhat bothering me was the 170 degree FOV with its very significant fisheye distortion.
So after seeing that GitUp started offering 90 degree FOV lenses without distortion I was very happy about it. I read up on the topic, I saw the relevant lens swap video on Youtube and after reading several threads on recommendations I decided to go with the f2.8 4.1mm lens which I purchased directly from the official GitUp webstore.
I had seen several such 90 deg lenses on other sites (ebay, Amazon etc) but I decided to play it safe and get the authentic lens straight from GitUp.
The lens came very quickly and just some days ago I finally found the time to do the swap.
I followed all the instructions carefully, disassembled the camera, removed the base with the 170 deg lens from the sensor and went ahead to install the 90 deg lens.
Much to my surprise, the new lens' base just wouldn't fit!
The distance between the two mounting holes is a couple of mm less than the original base! No matter how I tried, it would just not fit properly!
After comparing the two bases, I discovered that the tabs on either side of the 90 degree base are slightly shorter than the 170 version.
So after some thinking I put back the original base and decided to just unscrew the 170 degree lens and put the 90 degree one in its place. This worked perfectly, so I reassembled everything and started focusing the camera. After careful calibration with a chart I thought I was ready. Or so I thought...
I took some test videos and pics and when I pulled them up on my PC I was shocked to see how bad the image quality was! While the center of the lens was tack sharp both the left side as well as the right side were a total mess! Completely smudged and blurred. It is so bad that it almost looks like those diorama effects on some cameras where the sides of the photos are smudged to simulate a very shallow DOF.
Here is an example:
90 deg lens image sample
The same story continued with the video modes. Regardless of resolution the sides of the picture remained very badly blurred. Interestingly, if you examine the sample pics you can see some blurring on the top side of the center of the lens.
I thought that maybe the base was not seated properly after removing it. So before taking apart the camera again I decided to try the 170 degree lens to see what happens. If the base was to blame then it should have the same badly smudged areas. However, after focusing the lens and taking a few sample pics/videos everything seemed to be very sharp. (Please note that I had put both contrast and sharpness to maximum in order to help with the focusing)
170 deg lens image sample
So my question to you is, now what?
Did I get a badly decentered lens? Is the 4.1 lens incompatible with the Panasonic sensor of the Git2P? There is no such indication on the GitUp website.
How can I contact the company and return the lens? I know that they reply on the threads here occasionally so it would be very nice to hear from them how we could proceed. In the meantime, and ideas and/or suggestions would be most helpful!
Thanks a lot and apologies for the long message!
Cheers
Nick