Having imaged this target last year from my home backyard observatory with my more modest resolution and image scale (https://www.astrobin.com/na90f1/B/?nc=user), I was keen to image it with the higher resolution rig in Spain. We started the project during a waxing lunar cycle in March. The Ha data generated subtle detail in HII clumps in the flocculent-like inner structure but is not revelatory. The image does reveal the "striking yellow nucleus and galactic disk" referred to below from APOD's explanation as well as the dust lanes and a hint of an extended halo. I was excited to see these revealed as my post processing progressed.

I also paid particular attention to the bright blue star, 37 Lyn, with its sumptuous halo. I resisted over-sharpening the dust lanes as the optical train does not have the resolution, I feel, to justify such treatment after my earlier deconvolution; local contrast enhancement and a single application of very low MLT positive bias settings was sufficient on its own.

From APOD (https://apod.nasa.gov/apod/ap150428.html):"It is one of the more massive galaxies known. A mere 46 million light-years distant, spiral galaxy NGC 2841 can be found in the northern constellation of Ursa Major. This sharp view of the gorgeous island universe shows off a striking yellow nucleus and galactic disk. Dust lanes, small, pink star-forming regions, and young blue star clusters are embedded in the patchy, tightly wound spiral arms. In contrast, many other spirals exhibit grand, sweeping arms with large star-forming regions. NGC 2841 has a diameter of over 150,000 light-years, even larger than our own Milky Way and captured by this composite image merging exposures from the orbiting 2.4-meter Hubble Space Telescope and the ground-based 8.2-meter Subaru Telescope. X-ray images suggest that resulting winds and stellar explosions create plumes of hot gas extending into a halo around NGC 2841."

Data acquisition: Barry Wilson & Steve Milne

Processing: Barry Wilson