A tilt unit corrects sensor tilt and ensures uniform sharpness. The CTU from Gerd Neumann provides precise adjustment while also optimizing the back focus.
CTU XT M54 T11.3mm - still sealed.
Scope of delivery: CTU, Allen key, and M54 reversing ring.
As part of planning the mono configuration of my astrophotography system, I quickly decided that a tilt adapter should be included in the overall setup. This decision was finalized at the latest when I opted for a full-frame camera.
A tilt unit in astrophotography allows for precise alignment of the camera sensor to optimize image quality. Its key benefits include:
Sensor Tilt Correction: It compensates for any misalignment of the sensor, which could otherwise result in distorted stars.
Improved Image Sharpness: By ensuring accurate adjustment to the image plane, it guarantees uniform sharpness across the entire field of view.
A full-frame sensor is really large, and the corners of the sensor are quite far from the center of the focal plane. I don’t want to rely solely on software corrections for this; I prefer to address it directly by adding a tilt adapter on top for optimal results.
Choice of the Specific Tilt Unit
I decided on a CTU (Camera Tilt Unit) from Gerd Neumann. I had come across these high-quality tilt units several times in the past, so as soon as it was time to make a decision, I immediately reached out to Gerd Neumann. I was met with friendly and expert advice, and I could hardly keep up with all the helpful information. In short, I felt immediately well-informed and thoroughly supported by the manufacturer.
The tilt unit is adjusted using the head-side screws A, B, and C. The non-adjustable springs are taped off for safety. The locking screws can be tightened after successful adjustment.
The CTU has a minimum optical length of 11.3mm and can be extended by about 1mm. Therefore, the CTU serves two functions for me. In addition to its primary function of eliminating tilt, it also provides an option to precisely configure the back focus of my system. The 1mm extension is definitely sufficient for this.
The tilt unit in the overall configuration of multiple components when measuring the entire optical path for fine adjustment of the back focus.
I specifically chose the M54 version. The M68 variant would have been a viable option in my case, but it wasn’t necessary since I placed the tilt unit close to my camera, which has an M54 thread.
I would describe the precision of the CTU as unquestionably high-end. It’s rarely been so enjoyable to turn just three little screws 🙂
Fortunately, the adjustment can be made via screws on the side, allowing the entire system to remain fully assembled during the adjustment process.
Here you can see all three types of screws again: the taped-off spring screw, the adjustment screw “A” on the head side, and the locking screws above it.
I wouldn’t want to miss the Gerd Neumann Camera Tilting Unit in my high-end imaging system, and I’m glad I chose this product.
