Copenhagen Art & Photography

First tube photo in a while: A Russian 5U3C (Russian/Cyrillic: 5Ц3C) rectifier tube from 1976, so-called New Old Stock (NOS), meaning that the tube has never been used. The tube was bought for a Kondo Audio Note KSL-M77 pre-amplifier clone, this is not to be confused with an official Kondo product – or a product… Continue reading Audio Note preamplifier “clone” from Aliexpress / Exploding Capacitors

The Royal Veterinary and Agricultural University founded in 1856 was a veterinary and agricultural science university in Copenhagen, Denmark, up till its merger with University of Copenhagen in 2007. Surrounding the buildings, designed by Gottlieb Bindesbøll, are the unique gardens which house more than 6,000 different plants and flowers. The Gardens of the Royal Veterinary… Continue reading ‘Flora Excursoria Hafniensis’

This blogpost on the Leben CS-600 and the Leben CS-600X tube-based amplifiers started out as a thorough introduction to vintage tubes after buying a Leben CS-600 in 2024. From there, it branched out to cover additional amplifiers from Leben Hi-Fi Stereo Company; from their early models to their latest offerings of tube-based products with a… Continue reading Leben CS-600 ~ An Introduction to Leben Tube Amplifiers

The ‘Objects for an Ideal Home’ series is inspired by a 1999 music album — in the electronica genre, as it was labeled in the mid 90s — by that name. ‘Objects for an Ideal Home’ was produced and released by the Danish musician Opiate (Thomas Knak) on record label April Records. In 2009 a… Continue reading ‘Objects for an Ideal Home’

I’ve been away from the world of visual arts for about 16 years, but I’m back with a refueled interest after buying a vintage Nikon D3 for a minor macro-photography project. This branched out into shots of architecture and various objects, some of which have been clustered into the ‘Objects for an Ideal Home‘ series.… Continue reading Copenhagen Photographer ~ Kasper Bergholt

In December 2023, I ‘side-graded’ from a Pentax K5 to a Nikon D3. With the K5, I used either a 35mm macro limited lens or a 77mm 1.8 limited. The K5 had deteriorated gradually. First thing that stopped working, was the sd card slot where the cards got stuck, which meant that only the USB… Continue reading Shooting with the Nikon D3 in 2025 ~ Photos & Thoughts

This October (2024), I’ve done some night photography experiments with a Nikon D3 and a Pentax K1. On a  Pentax forum, I saw a couple of photos taken with an old Pentax K10D, which is the last DSLR camera from Pentax built around a CCD (Charge-Coupled Device) sensor. The 10D was released in 2006 following… Continue reading The Pentax K10D in 2025 ~ Photos & Impressions

The Carl Zeiss 35mm f/2 distagon is by some considered  the best of 35mm lenses made for Pentax mount (ZK). It was discontinued in 2010 resulting in high prices for deadstock and lenses in mint condition (especially in comparison to the same lens with Nikon or Canon mount, and they are rarely seen for sale… Continue reading The Zeiss 35mm f/2 distagon (ZK / Pentax mount) in 2025

With an odd focal length of 77mm and an unconventional f-stop value of 1.8 – in comparison to traditional values such as 55/50/80/85mm and 2.0 or 1.4 – we find ourselves in the company of the Pentax 77mm f/1.8 lens, the brainchild of Japanese lens designer Mr. Jun Hirakawa, a designer who clearly marches to… Continue reading Pentax 77mm 1.8 Limited Lens

Originally designed for use in televisions and radios, 6CS7 tubes generally see little use in audio products. The chief designer and owner of Leben Hi-Fi Stereo Company, Mr. Taku Hyodo, who is often referred as one of the eight best tube amplifier designers in Japan, has a fondness for the 6CS7 type, presumably because of… Continue reading 6CS7 Tubes: Data, Specifications & Usage