📚 Main Topics

1. Lens ComparisonOverview of the 100-400mm and 150-600mm telephoto lenses.
2. Ergonomics and DesignPhysical characteristics, weight, and usability of both lenses.
3. Optical QualitySharpness, aperture performance, and image quality.
4. Autofocus and StabilizationPerformance in various shooting conditions.
5. TeleconvertersCompatibility and performance with teleconverters.
6. Pricing and ValueCost comparison and overall value for wildlife photographers.
7. Alternative OptionsMention of the Tamron 150-500mm lens.

✨ Key Takeaways

• Size and WeightThe 100-400mm lens is smaller but extends when zooming, while the 150-600mm has an internal zoom mechanism, maintaining its size.
• Build QualityBoth lenses are weather-sealed, with the 150-600mm featuring a magnesium alloy frame, making it slightly heavier but durable.
• Aperture PerformanceThe 100-400mm has a faster maximum aperture (f/5.6) compared to the 150-600mm (f/7.1 at 400mm), but the latter performs better at its widest apertures.
• SharpnessThe 100-400mm lens achieves peak sharpness at f/8, while the 150-600mm delivers optimal results at its fastest apertures across the zoom range.
• AutofocusBoth lenses perform well with static and moving subjects, but the 150-600mm has additional controls for focus management.
• StabilizationThe 100-400mm has a dedicated stabilization switch, while the 150-600mm relies on camera settings for stabilization.
• Teleconverter UseBoth lenses are compatible with 1.4x and 2x teleconverters, but performance may vary, especially with the 150-600mm at longer focal lengths.

🧠 Lessons Learned

• Choosing the Right LensThe choice between the two lenses depends on specific needs such as size, weight, and desired focal length.
• Aperture AwarenessPhotographers should be mindful of aperture settings to avoid diffraction and ensure sharp images.
• Utilizing Autofocus FeaturesUnderstanding the autofocus features and settings can enhance shooting efficiency, especially in wildlife photography.
• Price ConsiderationsThe 100-400mm lens may offer better value, especially in second-hand markets, while the 150-600mm provides versatility and additional features.
• Exploring AlternativesThe Tamron 150-500mm lens is a viable alternative, offering a good balance of performance and price, though it lacks teleconverter compatibility.