Hoya DMC Pro1 UV(0) Filter

When I ordered my Nikon 10-24mm ultra-wide lens, I knew I needed to pick up a new UV filter to put on it right away. I’ve gone back and forth on whether to use UV filters or not on my lenses, but decided I needed one for protection on this lens since it has such a bubbled front lens element and a very small lens hood.

After some research, I decided the purchase the 77mm Hoya DMC Pro1 UV-0 filter because it has a slim frame to prevent vignetting, good multi-coating and a great price. If you are looking for a UV filter, you should read through the spectrometer testing results over at lenstip.com. It’s interesting to see that Hoya multi-coated filters test better than or equal to more expensive B+H or Heliopan filters. I use mostly Hoya filters and continue to buy them for their great quality and price.

I really like the feel of this filter. The matte finish and knurled edge makes it very easy to take on and off and it looks like it belongs on the lens. It feels sturdy with no movement of the glass in the frame. I see no decrease in image quality at all and I feel much better having that bulbous front element covered. I’ve not had any issues with reflections or flare.

Since this is a slim frame filter, you cannot attach any filters to the front of it. However, unlike some other slim frame filters, you can still use the original lens cap because there is a single groove where normally there are threads. I’ve found this groove actually holds the lens cap better than the standard threads. Since you cannot stack additional filters, this may not be a great option on a non-wide angle lens if you plan to stack additional filters, but you probably wouldn’t want to stack with a UV filter anyway. If you use an Expodisc, you’ll find you have to hold it on to the filter carefully because it won’t snap into the slim single groove.

Since the spectrometer results indicate the Hoya HMC UV, the Super-HMC UV, and this Hoya Pro1 UV are essentially optically equal, the choice comes down to price and usage. I needed the slim frame of the Pro1 UV-0 and now after using it, I prefer it’s build to the others. I’d buy it again for other lenses since it’s only slightly more expensive than the standard HMC but less than the Super-HMC.

Abandoned Psychiatric Hospital and Power Plant

Out of a sudden need for a photo adventure, a few friends and I decided to explore the abandoned Northville Regional Psychiatric Hospital. Even though we only made it to 4 buildings, it was fascinating. There are so many buildings on the campus we probably could have spent 2 days exploring, but we only had a few hours. This is some of what we saw.

Millett “Starving Student” Hybrid Tube Headphone Amp Build

This summer I had an itch to build something. I had been reading about headphone amplifiers and found the schematics for the popular Millet “Starving Student” Hybrid amp. I am new to electronics building, but this looked like a great project to learn with. I started my search for parts finding most of them at mouser.com but quickly realized that the 19J6 Tubes were going be be difficult to find. I contacted all the tube dealers I could find online and luckily found one that had three 19J6 tubes available. I bought all 3, which ended up being a good idea since I dropped one later on.

Once I received all the parts I built a prototype to the original MSSH amp specifications. It worked and sounded pretty good! I took what I learned from building the prototype and began planning out how I would build my final amp. I knew I wanted to make the enclosure out of wood, so I started to search for the kind of wood and finish that would compliment the warm glow of the tubes and work well with black hardware. I decided on bocote with a pure tung oil finish.

As I was building a new list of parts, I discovered that many users over at head-fi.org had been experimenting with and modifying the original schematic to enhance the sound as well as fix the power supply start up issue. I even found an updated schematic that uses the easily available 12AU7 tubes. I wished I had found the 12AU7 version at first, but since I already had the 19J6 tubes, I decided to continue to use them but with updated capacitors and resistors according to schematics and ideas posted throughout the head-fi.org starving student boards.

I really enjoyed building this amp and recommend it to anyone looking for a fun project or who just wants better sound through their headphones. It really does sound great, especially if you use the modified schematics. The bass is extended and the sound is warm and full. It’s much better than the headphone output from my computer or iPhone, and I love the look of the tubes glowing on my desk. Below are images of the final amp and some images of the building process. I plan to take what I learned from this project and build my own guitar effect pedals and a stereo power amp in the future.

The Completed Headphone Amp

 The Building Process