The current ‘gold-standard’ reference UV-pass filter is the Baader U filter. This filter is essentially a thin UG11 filter with multiple layers of dielectric coating applied to it. It has sufficient IR-block to prevent any IR-contamination of the UV image.
While it is thought to be the best UV-imaging filter out there, it is certainly not a cheap filter, and the price seems to go up with each passing year, making it even more out of reach to many who may be interested in UV-imaging. Hence it is worth considering if there are any more affordable options out there. I have shot the same flower with the different filter stacks, so the resulting UV image can be compared. Continue reading UV-Pass filters – a comparison→
I thought I would see far I could magnify the petal to capture its details in UV. Hence I shot numerous images for stacking to form each image. These were processed with Helicon Focus to produce the stacked petal images you see below. Lighting was from Quantum X2D flash. Continue reading Rudbeckia Petal structure UV Macro→
Sony does have an interesting lineup of lenses. Some of these lenses have special abilities with no equivalent amongst the other manufacturer’s lens lineup. One of these is the Sony 500mm F8 mirror autofocus lens. This is the most compact and lightweight 500mm autofocus lens available.
I have been an early follower of the Sony E-mount system, having bought and used the NEX-3, NEX-5, NEX-5N, NEX-7, NEX-6 and now the A7R and A6000 – I have noticed a gradual improvement with each new generation of E-mount camera in terms of usability and functionality.
The Sony NEX-3 was the first camera I modded to full-spectrum by removing the internal cut filter (ICF). It proved useful for UV and infrared imaging, as the native lenses retained the ability to infinity focus. Continue reading Sony NEX-3 Infrared→
One of my many hobbies is fish keeping. I began seriously keeping fish from 1993. Hence I thought I should post some images of the fish I have kept. In the past, I have kept goldfish, tropical fish such as discus, and koi carp. Continue reading Fish photography→
There were these Dahlias of different colours growing in the adjacent flower beds to the Rudbeckias I shot the other day. I could not resist shooting these flowers to see what their UV and IDS patterns looked like.
Previously, I had posted about my collection of 35mm F3.5 lenses. But the Soligor 35mm F3.5 lenses I’ve bought and tested (serial number: 9#####), have some endearing qualities worth mentioning. Continue reading Soligor 35mm F3.5 lens→
I really like these 35mm F3.5 enlarger lens. They are compact, fairly sharp wide open and it is a fairly well corrected design with no colour fringing in the out of focus areas and also minimal focus shift from UV to visible light. Hence ideal for adapting for imaging. Continue reading 35mm F3.5 enlarger lens for photography→
Have you ever needed different stepping adapter sizes which are not available? Have you ever wanted a female to female thread adapter to join two pieces of camera equipment together? If so, read on. You may be surprised that what you needed before is actually right under your nose; all it takes is a little ingenuity. Continue reading Stepping Rings and its many uses→