Here is my first tube photo in a while: a Russian 5U3C (Cyrillic: 5Ц3C) rectifier tube from 1976. It’s what’s known as New Old Stock (NOS), meaning that the tube has never been used. The tube was bought for a Kondo Audio Note KSL-M7 preamplifier clone produced and sold by the Chinese brand Sunbuck on… Continue reading Sunbuck Kondo Audio Note KSL-M7 preamplifier clone
The Pentax K10D in 2026 ~ Review, Photos, Impressions
In October, I did some night photography experiments with a Nikon D3 and a Pentax K1. On a Pentax forum, I came across some photos taken with the Pentax K10D, the last Pentax DSLR to use a CCD (Charge-Coupled Device) sensor. The 10D was released in 2006 following a range of CCD-based 6.1 megapixels DSLRs… Continue reading The Pentax K10D in 2026 ~ Review, Photos, Impressions
The Pentax 77mm 1.8 Limited Lens in 2026
The Pentax 77mm f/1.8 lens, the brainchild of Japanese lens designer Jun Hirakawa, stands out with its unusual focal length of 77mm and f-stop value of 1.8. These specifications diverge from more traditional choices like 50mm, 80mm, or 85mm, and apertures such as f/1.4 or f/2.0, clearly showing Hirakawa’s unique approach. Interestingly, the 77mm, launched… Continue reading The Pentax 77mm 1.8 Limited Lens in 2026
The Carl Zeiss 35mm f/2 Distagon, Pentax Mount (ZK) in 2026
Some consider the Carl Zeiss 35mm f/2 Distagon the best 35mm lens 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 on sites like… Continue reading The Carl Zeiss 35mm f/2 Distagon, Pentax Mount (ZK) in 2026
6CS7 Tubes: Data, Specifications & Usage
Originally designed for use in televisions and radios, 6CS7 tubes are rarely used in audio products. The chief designer and owner of Leben Hi-Fi Stereo Company, Mr. Taku Hyodo, who is often referred to 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
Pentax *ist DS ~ 2026 Review ~ Photos ~ Impressions
The Pentax *istD series marked a significant milestone for Japanese brand Pentax when it was introduced in the early 2000s. The series was the brand’s first venture into digital SLR cameras. The series built upon Pentax’s reputation for solid build quality, compact design, and advanced technology at an affordable price. The first camera in the… Continue reading Pentax *ist DS ~ 2026 Review ~ Photos ~ Impressions
The Leben RS30-EQ RIAA, 6X5GT & ECC81 Tubes
In addition to a Leben tube amplifier, I’m also satisfied owner of Leben’s only RIAA so far, the Leben RS-30EQ, which both looks and sounds stunningly well. The RS-30EQ RIAA is based on a circuit including a single 6X5GT rectifier tube and two 12AT7s Jan Philips tubes. The European designation for the 12AT7 is ECC81. 6X5GT… Continue reading The Leben RS30-EQ RIAA, 6X5GT & ECC81 Tubes