Borbin the 🐱

Every masterpiece begins in silence. The 👩🏻‍🍳 sets the stage, then time, heat and patience compose a quiet piece of culinary art.

Stage 1: Raw Ambition

A turkey in its natural state is like an unread book, full of potential, but mostly cold and uninviting. At this point, the only evolution is your growing doubt about oven size.

1/13s f/2,8 ISO 250/25° 16-50mm f/2,8 VR f=28mm/42mm

Stage 2: The Great Migration

It moves from countertop to oven, a journey as inevitable as Monday mornings. Here, transformation begins quietly under heat and time.

1/10s f/2,8 ISO 250/25° 16-50mm f/2,8 VR f=44mm/66mm

Stage 3: The Slow Enlightenment

Hours pass. The turkey meditates in 170°C silence, contemplating its purpose. It emerges wiser, crispier, and slightly golden, proof that patience and heat can turn blandness into brilliance.

1/40s f/3,2 ISO 250/25° 16-50mm f/2,8 VR f=50mm/75mm¹

Stage 4: The Final Form

On the table, surrounded by sides and expectations, the turkey achieves peak relevance. For a brief moment, it is the influencer of the dining room. Then, like all trends, it is consumed and forgotten.

1/20s f/2,8 ISO 400/27° 16-50mm f/2,8 VR f=34mm/51mm

A picture impossible to make with a single exposure

1/25s f/2,8 ISO 400/27° 16-50mm f/2,8 VR f=27mm/41mm

The shallow depth of field creates a beautifully blurred background, something that gives the image its depth and character. To achieve sharpness across the entire plate without losing that blur, two shots were taken: one focused on the front, the other on the back of the plate and then combined using Focus Stacking

Simply stopping down the aperture for more depth of field would have rendered the plate sharp, but also flattened the scene, turning it into the kind of phone photo where the background looks lifeless. This blend keeps the plate crisp while preserving the softness behind it.

Back to the kitchen:

At first it hides its promise. Add time, heat, and a little seasoning and it becomes a quiet piece of culinary work.

The day Nikon announced their new DX 16-50mm f/2.8 lens², I opened the optical upgrade protocol with a preorder 🚀

My previous lenses lined up for eBay, forming a support group titled "Former Stars of the Camera Bag". They successfully negotiated their exit strategy with descriptions that read like dating profiles: "Still sharp, loves sunsets, seeks photographer who appreciates vintage charm and no diffraction tests under f/8".

Inside the Upgrade Shop³

Announcement - October 16, 2025 📰

The new NIKKOR DX lens is available soon. Compact, fast, and ready to redefine the setup.
Optical upgrade protocol signaled.

Preorder - October 16, 2025 🛒

Optical upgrade protocol opened.
Shipping date: October 30, just in time for the Halloween magic⁴

Delivery - November 5, 2025 📦

Signature required delivery confirmed, package has achieved indoor status.

The First Light 🌅

Optical upgrade protocol in progress: lens mounted and ready for action.
Lens on a Z30 and Z50 II

Through the New Lens

First Frames In: Precision and Agility from the Start
(All pictures taken with the Nikon Z50 II)

1/160s f/6,3 ISO 100/21° 16-50mm f/2,8 VR f=16mm/24mm

1/320s f/2,8 ISO 100/21° 16-50mm f/2,8 VR f=23mm/35mm

1/125s f/5,6 ISO 100/21° 16-50mm f/2,8 VR f=50mm/75mm

1/160s f/5,6 ISO 100/21° 16-50mm f/2,8 VR f=32mm/48mm

1/3200s f/2,8 ISO 100/21° 16-50mm f/2,8 VR f=50mm/75mm

1/400s f/2,8 ISO 100/21° 16-50mm f/2,8 VR f=50mm/75mm

1/80s f/6,3 ISO 100/21° 16-50mm f/2,8 VR f=25mm/37mm

1/640s f/2,8 ISO 100/21° 16-50mm f/2,8 VR f=50mm/75mm

1/640s f/11 ISO 1600/33° 16-50mm f/2,8 VR f=50mm/75mm

1/320s f/16 ISO 1600/33° 16-50mm f/2,8 VR f=50mm/75mm

1/160s f/22 ISO 1600/33° 16-50mm f/2,8 VR f=50mm/75mm

1/80s f/4 ISO 100/21° 16-50mm f/2,8 VR f=24mm/36mm

1/200s f/4 ISO 100/21° 16-50mm f/2,8 VR f=50mm/75mm

1/640s f/2,8 ISO 100/21° 16-50mm f/2,8 VR f=50mm/75mm

1/160s f/6,3 ISO 100/21° 16-50mm f/2,8 VR f=16mm/24mm

1/125s f/6,3 ISO 100/21° 16-50mm f/2,8 VR f=16mm/24mm

1/200s f/6,3 ISO 100/21° 16-50mm f/2,8 VR f=50mm/75mm

1/400s f/5,6 ISO 100/21° 16-50mm f/2,8 VR f=50mm/75mm

1/320s f/2,8 ISO 100/21° 16-50mm f/2,8 VR f=50mm/75mm

Why Does This Lens Show Strong Vignetting at 50mm f/2.8?

Observe the heavy vignetting at 50mm f/2.8, along with the visible distortion. Zoom in and it disappears. Left side is without correction, right side with correction using NX Studio.

The sample image shows noticeable darkening in the corners at 50mm and f/2.8. This effect is called vignetting and it is an unfortunate but common characteristic of optical design, especially in compact zoom lenses with a bright aperture.

The NIKKOR Z DX 16-50mm f/2.8 VR combines a constant f/2.8 aperture with a small, lightweight form factor. To achieve this, the front element is relatively small. At longer focal lengths and wide apertures, light rays entering from the edges are partially blocked, which results in corner shading.

Vignetting increases when the angle of light hitting the sensor becomes steeper, as happens when zooming in. Eliminating this effect completely would require much larger lens elements and a heavier construction. A lens designed to avoid vignetting at f/2.8 would be significantly bigger, heavier, and more expensive, which goes against the goal of a compact DX zoom.

For this reason, some level of vignetting is considered acceptable and is typically corrected in-camera or during post-processing. If you shoot RAW, most software applies lens profiles to fix this. For JPEGs, Nikon's vignette control can reduce the effect.

Protocol Complete ✅

Adding this lens makes the setup minimal and faster, ready for decisive moments.
The 16-50mm f/2.8 combines a constant aperture with a compact design for a balanced, practical setup. From landscapes to portraits, the zoom range provides complete framing control while keeping everything light and portable. No lens swaps, just a responsive system that adapts quickly. Vibration Reduction works together with the bright aperture to maintain sharp, balanced results even in challenging light.

Understanding Adobe RGB: When a Filename Starts with an Underscore

Color management is a subtle but critical aspect of digital imaging. One often overlooked detail is how some cameras signal the use of wide-gamut color profiles like Adobe RGB using the filename itself. When a filename starts with an underscore _, it indicates that the image was captured using the Adobe RGB color space. This is a filename-based convention and not embedded in the image metadata.

	_DSC1234.JPG	→	Adobe RGB
	DSC1234.JPG	→	sRGB

Visual Comparison

Below is a comparison of the same image displayed with and without Adobe RGB interpretation. Notice the richer greens and cyans on the left.

D700 1/250s f/8 ISO 200/24° 8mm f/3,5G

Why Adobe RGB?

Adobe RGB is a color space developed by Adobe Systems in 1998 to encompass most of the colors achievable on CMYK printers. Compared to the standard sRGB, Adobe RGB offers a wider gamut, especially in the green and cyan regions. This makes it ideal for professional printing and high-end image editing workflows.

Color Space	Gamut Size	Best For	Display Compatibility
sRGB	Smaller	Web, general use, non-color-managed devices	Universally supported
Adobe RGB	Larger	Printing, professional editing, preserving rich colors	Requires color-managed software

The CIE 1931 xy Chromaticity Diagram

It shows color hue and saturation (not brightness).

• x-axis: how much red vs green is in the color.
• y-axis: how much green vs blue is in the color.

It comes from the CIE XYZ color system, where Y relates to brightness.
Like a map of all visible colors:

• The curved edge is pure spectral colors (rainbow).
• Inside the shape are all mixtures of colors.
• White (D65) is near the center.

See github

sRGB: R(0.6400, 0.3300), G(0.3000, 0.6000), B(0.1500, 0.0600)
Adobe RGB: R(0.6400, 0.3300), G(0.2100, 0.7100), B(0.1500, 0.0600)
White point D65: (0.3127, 0.3290)

Working with Adobe RGB Images

When working with Adobe RGB images, especially in everyday scenarios, it is important to consider how they will appear across different devices and platforms.

General Use

For typical viewing and sharing, converting Adobe RGB images to sRGB is recommended. sRGB is the standard color space for the web and for devices that do not support color management, which helps ensure consistent appearance.

Accurate Conversion

Before publishing or sharing images online, ensure they are converted to sRGB to maintain consistent appearance across devices. Software with reliable color management support, such as the cPicture App, interprets embedded ICC⁵ profiles and filename-based color space conventions with quiet precision. This helps ensure that colors appear as intended, even in situations where other tools might not get it quite right, often without the user realizing why.

A cold, wet, and grey Sunday. Pacific Northwest in autumn is nature's way of saying, "Stay indoors."
So thats where we stay. In the Seattle Art Museum, of course.

Where architecture curves into art — captured in a fisheye projection

1/200s f/5,6 ISO 200/24° f=7,5mm

Interactive Panorama Seattle Art Museum 1

1/200s f/5,6 ISO 200/24° f=7,5mm

Interactive Panorama Seattle Art Museum 2

1/200s f/5,6 ISO 200/24° f=7,5mm

FriendsWithYou: Little Cloud Sky

Location: Brotman Forum (Main Foyer)

SAM exhibitions ⁶

1/50s f/5,6 ISO 640/29° f=7,5mm

1/30s f/5,6 ISO 250/25° f=7,5mm

1/40s f/5,6 ISO 1000/31° f=7,5mm

1/30s f/5,6 ISO 2000/34° f=7,5mm

American Art: The Stories We Carry

This exhibition includes several works by Andy Warhol, highlighting his iconic Pop Art style.

1/40s f/5,6 ISO 2000/34° f=7,5mm

1/40s f/5,6 ISO 2500/35° f=7,5mm

1/40s f/5,6 ISO 6400/39° f=7,5mm

1/50s f/5,6 ISO 3200/36° f=7,5mm

1/50s f/5,6 ISO 3200/36° f=7,5mm

Interactive Panorama American Art: The Stories We Carry

1/40s f/5,6 ISO 2500/35° f=7,5mm

1/50s f/5,6 ISO 1000/31° f=7,5mm

1/50s f/5,6 ISO 1000/31° f=7,5mm

1/50s f/5,6 ISO 1600/33° f=7,5mm

1/50s f/5,6 ISO 1600/33° f=7,5m

1/80s f/5,6 ISO 5000/38° f=7,5mm

Only Connect: The Art of Devotion

SAM exhibitions

1/50s f/5,6 ISO 16000/43° f=7,5mm

SAM Stories, The Visitation, 1643, Philippe de Champaigne

1/50s f/5,6 ISO 8000/40° f=7,5mm

Interactive Panorama Only Connect: The Art of Devotion

1/50s f/5,6 ISO 16000/43° f=7,5mm

A Goya worth reversing entropy for, but today I let time flow forward through my lens. Tenet.
SAM Stories

1/50s f/5,6 ISO 6400/39° f=7,5mm

Art and Life Along the Northwest Coast

SAM exhibitions

1/50s f/5,6 ISO 4000/37° f=7,5mm

1/50s f/5,6 ISO 4000/37° f=7,5mm

1/50s f/5,6 ISO 5000/38° f=7,5mm

1/50s f/5,6 ISO 5000/38° f=7,5mm

Chronicles of a Global East

SAM exhibitions

1/80s f/5,6 ISO 16000/43° f=7,5mm

Roman Art: The Diversity of an Empire

1/50s f/5,6 ISO 4000/37° f=7,5mm

1/50s f/5,6 ISO 4000/37° f=7,5mm

Impressionisms: The Global 19^th Century

1/50s f/5,6 ISO 6400/39° f=7,5mm

Winter Landscape on the Bank of the Seine, Henri Matisse

SAM Stories and SAM's collection

1/50s f/5,6 ISO 6400/39° f=7,5mm

Porcelain Room

SAM exhibitions

1/50s f/5,6 ISO 8000/40° f=7,5mm

The Italian Room

SAM Stories and SAM's collection

1/50s f/5,6 ISO 8000/40° f=7,5mm

Interactive Panorama The Italian Room

Noise reduction was not applied to retain details; the images were only graded⁷.
There was no time for multiple exposures for HDR, and of course no tripod because we were in a museum. I only had a brief moment when the room was empty to capture a 360°×180° panorama.

1/50s f/5,6 ISO 8000/40° f=7,5mm

It was really dark in this room. Here are the ungraded raw images:

1/50s f/5,6 ISO 8000/40° f=7,5mm

From Galleries to Sidewalks

When we left the museum, it was only partly cloudy with a hint of sunshine. The Pacific Northwest's quiet way of saying thanks for staying.

1/400s f/5,6 ISO 100/21° f=7,5mm

From the calm of the galleries to the vibrant pulse of Pike Place Market

1/125s f/5,6 ISO 2500/35° f=7,5mm

1/125s f/5,6 ISO 100/21° f=7,5mm

For years, Chang Jiang Unlimited (CJU) was the go-to resource for owners and enthusiasts of the legendary Chang Jiang 750 motorcycles. It offered technical documentation, restoration tips, parts information, and a wealth of knowledge that kept these classic sidecar bikes on the road.

❓ What Happened

The original CJU website changjiangunlimited.com disappeared years ago. The domain went offline, and most of its content was lost to time. Even the Wayback Machine only preserved fragments. For many in the community, this meant losing an irreplaceable source of information.

✅ The Good News

Back when CJU was still online, site owner Dan Crossman offered to share the entire site content with anyone willing to preserve it. I accepted that offer and secured the complete dataset, which takes up about 10 GB of disk space across nearly 60k files.
Not sure if there is another copy, but anyway, here it is.

This archive includes:

• Original technical guides and toolbox resources
• Historical documentation for CJ750 models
• Restoration and customization guides
• Community knowledge

The content is now fully integrated into the new site and is freely available here⁸:
https://bitfabrik.io/cju
Everything is preserved in its original structure and format, including the classic gold-and-red colors we would never dare to put on a bike.