645 Panorama Stiching with D-FA 35mm

2351HD · 10-05-2018, 07:44 PM

Hi,
I have a used D-FA 645 35mm lens on the way to use with my 645z. Just wondering if anybody here has done any panorama stitching with this lens?

I am looking to do mainly just single row panoramas of 2-3 images with the camera in either landscape or portrait orientation, so nothing awfully difficult. I just want to get images that are similar image width to a 17mm lens for those times when I do not have my Canon 5D4 and 16-35mm lens with me, or when I need critical resolution and dynamic range.

Just looking to see if there is any "gotchas" I need to look out for with this particular lens, such as vignette or distortion correction. Also if anybody knows the nodal point distance that would help out a bit too.

Thanks, Scott

torashi · 10-05-2018, 10:51 PM

You can find the nodal point by tilting the camera side to side on a panoramic gimbal head with two poles (or light stands), one near, one further away which straight on the first covers the second. Move the camera and lens combo back and forth until the second pole doesn't show when you pan the camera. A very straight wall surface works, too (shoot it perpendicular to the film plane). The wall should stay hidden once you pan.

2351HD · 10-06-2018, 12:22 AM

Thanks, I do understand how to find a modal point, I’ve done it before. Just thought if somebody had a good measurement to start from it might make it easier.

torashi · 10-06-2018, 05:56 AM

It's hard to say without knowing the optical design. Entrance and exit pupil distance are measurements that are not common practice to be published, although they should be. You might want to look at the lens from the front with the aperture stopped all the way down and eyeball the distance. If you had acces to a laser distance measurer, you would be set.

10-05-2018, 07:44 PM	#1
2351HD Veteran Member Join Date: Apr 2013 Location: Brisbane, Australia Photos: Albums Posts: 750	645 Panorama Stiching with D-FA 35mm Hi, I have a used D-FA 645 35mm lens on the way to use with my 645z. Just wondering if anybody here has done any panorama stitching with this lens? I am looking to do mainly just single row panoramas of 2-3 images with the camera in either landscape or portrait orientation, so nothing awfully difficult. I just want to get images that are similar image width to a 17mm lens for those times when I do not have my Canon 5D4 and 16-35mm lens with me, or when I need critical resolution and dynamic range. Just looking to see if there is any "gotchas" I need to look out for with this particular lens, such as vignette or distortion correction. Also if anybody knows the nodal point distance that would help out a bit too. Thanks, Scott

10-05-2018, 10:51 PM	#2
torashi Veteran Member Join Date: Sep 2017 Location: Medellín Posts: 1,322	You can find the nodal point by tilting the camera side to side on a panoramic gimbal head with two poles (or light stands), one near, one further away which straight on the first covers the second. Move the camera and lens combo back and forth until the second pole doesn't show when you pan the camera. A very straight wall surface works, too (shoot it perpendicular to the film plane). The wall should stay hidden once you pan.

10-06-2018, 12:22 AM	#3
2351HD Veteran Member Join Date: Apr 2013 Location: Brisbane, Australia Photos: Albums Posts: 750 Original Poster	Thanks, I do understand how to find a modal point, I’ve done it before. Just thought if somebody had a good measurement to start from it might make it easier.

10-06-2018, 05:56 AM	#4
torashi Veteran Member Join Date: Sep 2017 Location: Medellín Posts: 1,322	It's hard to say without knowing the optical design. Entrance and exit pupil distance are measurements that are not common practice to be published, although they should be. You might want to look at the lens from the front with the aperture stopped all the way down and eyeball the distance. If you had acces to a laser distance measurer, you would be set.