The Shadow Knows

When the conditions are right, such a clear blue sky, your 360-degree image may contain a shadow of the camera and tripod. Therefore, you should try to place the camera and tripod to avoid the shadow, minimize the shadow, or at least make the shadow’s removal easy.

In the first image taken at Middleton Place, the camera and tripod shadow is hidden in the shadows of the trees- no post-processing is required.

For the images of the United States Custom House, the sky was clear and the Sun was high in the sky. There were no obvious places to hide the shadow; however, I knew it would be relatively easy to remove the shadow with photoshop.
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Charleston SC October 2017

My wife and I decided to take a last minute trip to Charleston, South Carolina. We left on October 22nd and returned on October 29th. For the first 2 days, there was heavy rain and it was impossible to take any … Continue reading

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Sony Alpha Rumors

A site I visit daily is Sony Alpha Rumors. The site is dedicated to Sony cameras, lenses, and related gear. If you are a Sony fan I recommend adding this site to your daily read.

Occasionally, they will link to interesting offers and the one that caught my attention today was A Special Deal For SAR Readers: Photographer’s Projects Collection. I have used their HDR Projects software and decide to upgrade to the projects collection.

 

 

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360° Imaging

For the last 2 months, I have been involved with 360° imaging for e-commerce. I have been working with Joshua Tree Depot and Ashley Karic to produce 360° product images.

This Joshua Tree Depot blog post highlights some of my early work with their products.

When I began to work on the projected, I needed to obtain a photographic turntable. Since I would not only be working with mannequins but also models I needed a turntable that could take at least 200 lbs load.

I ended up selecting the Crayfish 55 by Seabass. This turntable can handle up to 140 kg (over 300 lbs) and easily interfaces to Nikon, Canon, or Sony cameras.

My lighting was already taken care of, as I already own an Elinchrom Quadra Ranger RX flash system.
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Entrance Pupil Measurement of the Voigtlander 10 mm

The Voigtlander 10 mm lens does not come with any manufacturer data regarding the position of the entrance pupil. However, being an extreme wide-angle lens the entrance pupil must be very close to the front of the lens.

Following the method discussed in Measuring The Entrance Pupil, the entrance pupil can easily be determined- see Table 1.

The entrance pupil position from the image plane was determined to by 68.7 mm or 50.7 mm from the flange. On the Roundshot VR Drive with the Really Right Stuff MPR-CL nodal rail, this gives a measurement of 79.2 mm.
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Sheraton Desert Oasis May 2017

I have finally sorted and cataloged all the panoramic images I took on my recent trip to Utah and Arizona. There are approximately 170 panoramas, and I have just begun the rendering. On our last day in Arizona, I decided … Continue reading

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Measuring the Entrance Pupil Of the Zeiss Loxia Lens Series

This article is to support the entrance pupil measuring technique outlined in Measuring the Entrance Pupil.

Zeiss provides entrance pupil data for the Loxia 21, 35, 50, and 85 mm lenses- see the Zeiss EP data in Table 1. Zeiss gives this data referenced from the image plane, and for the Sony A7, the flange to image plane distance is 18 mm.

I was not surprised to see the calculated focal length to vary from the nominal manufacturer’s value. However, I was surprised that the calculated focal length of the 85 mm lens was 91.8 mm- I repeated these measurements several times.
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