![]() ![]() A 100mm will yield 4x more, and a 135mm will yield 7x more resolution.įor large format panoramas, we’re going to step up to a medium telephoto… between 85mm and 135mm. Shooting a multi-row panorama with an 85mm lens will result in nearly 3x more resolution than when using a 50mm lens for the same field of view. In the medium format technique, we used a 50mm lens. The primary difference between a “medium format” pano and a “large format” pano is the use of an even longer focal length lens. We simply combine multiple overlapping photos from a longer focal length lens to make a final photo with a much larger field of view and much higher resolution. And the methods I’m using for large format astrophotography are not much different from the panorama technique I showed in my post about “medium format astrophotography”. Of all of the techniques for shooting and processing that I’ve explored, panorama stitching stands out above all the rest in terms of improving resolution and maximizing the overall quality of an image. The equivalent sensor area of a large format panorama can be many times larger than common sensor sizes like full-frame, resulting in unparalleled image quality. The results are astrophotos with resolutions that can range from 150 megapixels to 1 gigapixel or more. Pretty much any interchangeable lens camera or camera with a 1″ sensor or larger will be able to utilize this technique. With the techniques in this article, it’s possible to emulate the image caliber of a 4×5″ or even an 8×10″ large format camera using a regular DSLR or mirrorless camera. I’ve spent the last half year learning how to shoot and process large format landscape astrophotography panoramas. Each image had to be compensated before the import into PTGui.And so, I’d like to share what I’ve discovered so far in my quest for capturing more pixels. When finalizing the carousel image on the top, lens vignetting (light fall off in corners) in the sky needed additional work. The human eye is very sensitive to this type of effect and repeating patterns have to be fixed. It is also very common that dirt on the image sensor repeats itself all over the place after stitching a panorama. Blend priority can be adjusted in the advanced settings menu under image parameters, change blend priority from 100 down to 10-20 for the relevant images. ![]() To limit the use of this noisy image in the final panorama it is a very good idea to lower the blend priority for this image (the nadir shot). I shot this image on free hand and in night scenes with very high ISO (which means much higher noise level). Often this image is the most difficult to get right because all other images can be shot with the tripod and perfect alignment. True 360×360 panos require at least one image to be shot vertically down. The example below needed a lot of Photoshop adjustments because the water moved between each image and it was shot on free hand.įull scene stereographic image created with PTGui Pro This is fixed in Photoshop, export the panorama with all layers separated (blended and layers) to one single. The automatic alignment is very good but usually there are moving people in the scene, cars driving by and other local difficulties that have to be fixed. In most cases the need for post processing is very small. This can be done in the hidden optimizer menu: go to the advanced setting (Project Assistant, upper right corner) then select Optimizer, click Advanced again and enable viewpoint optimization for each image that you think needs to be tilted. ![]() In those cases try to enable viewpoint compensation for each misaligned source image. For normal panorama images the default setting works very well, but in some cases when assembling a panorama including very close objects any small misalignment ruins the final result. Apply the reference points before trying to align the images. A few smartly selected reference points can do magic. Multiple pictures were used to create this carousel image using PTGui Proĭepending on how badly aligned your source images are, PTGui might need some help to do a good job. ![]()
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