Author: Jörgen Hellberg

A cold and windy summer evening in Steninge Halland

One of my favourite places in Sweden is the west coast in Halland. My first memories, from this coast goes back to the 60: s racing down a snow-covered sand dune on a red sled. I have been camping here during beautiful summer weeks but this time bringing the family I rented a cabin – […]

Photogrammetry step 4 – Preparing a model for upload is online

In this step I show you how to Select and delete free floating debris Select and smooth artefacts on the surface of the model Decimate the model Adjust the texture / UV map Read more here; Photogrammetry step 4 – Preparing a model for upload

Lavender summer

Essex skipper (Thymelicus lineola), Mindre tåtelsmygare, is one of our common guests in our lavender bushes. A less common guest is the interesting Hemaris fuciformis, broad-bordered bee hawk moth, (Humledagsvärmare) with its almost transparent and very fast wings. For these photos I used the Canon 6D camera with the EF 100 mm f2.8L Macro IS […]

My Photo PC build web page is on line

I have started to list the components that I use for my photo PC. My ambition is to have a PC with enough speed for focus stacking for a reasonable price. Read more on the web page. My Photo PC build.

Closing in on the Rose chafer

Even if this bird-like figure has a slight resemblance to human rock carvings it is as far from it at it can be. This is a small detail of the abdomen of the beetle Rose chafer (Cetonia aurata). For this photo I used a Polarized light and a Nikon plan fluor 20x ELWD 20x NA […]

Detail of a rock carving

This is a detail from one of Sweden’s largest rock carvings. It is one of two horses that are pulling a carriage. The carving is dated to the bronze age 1800-500BC. The carving is called Örstaristningen and can be found close to bird lake Angarnssjöängen in Vallentuna. You can buy this picture from Alamy at […]

Updated the depth of field page

I have uppdated the depth of field page with some example calculations of depth of filed (DOF) with green light and air, using this formula. Read more here, Depth of Field


This is a Cross eyed stereo picture of Pyrite. Pyrite is cubic crystals of iron disulfide. For this picture I stacked over 800 photos in Zerene Stacker. I used a Canon 6D camera and a Mitutoyo M Plan Apo 20x and a Raynox DCR-150 as a tube lens.

Updated speed test

For Helicon Focus I have added performance with hardware acceleration. Using an AMD Ryzen 7 3700X Processor and having the photos on a 1 TB Kingston’s A2000 NVMe PCIe SSD internal hard drive a large stack of 849 TIFF pictures 114MB each took 4 minutes and 43 seconds. This is approximately 3 pictures per second. […]

Focus shifting or bracketing

One method to acquire the photos for Focus stacking is focus shifting or bracketing. Just focus on the nearest thing you want to have in focus in the final picture, take a photo shift focus a tiny bit, take a new photo, shift focus take another photo and so on. Some newer cameras have the […]

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