Hasselblad XCD 28P f4 vs 25mm f2.5v for astrophotography

[as1mov]

Hi,

I am not an astrophotographer, but I understand that the Hasselblad 25mm f2.5v is a better option than the 28P for astrophotography, because it is a faster and wider lens.

However, I have heard somebody making the argument that with the new Hasselblad AI-based noise reduction the 28P becomes a viable options, which I'd tend to believe.

The 25mm is however known to have negligible coma WO. But what about the 28P? I have found no tests online about this problem. I did the quite unscientific test of pointing the camera tonight at far city lights and, just looking at the image preview on the back of the camera, I do not see any visible coma.

What is your experience?

Thank you

 

[bokesan]

Hi,

I am not an astrophotographer, but I understand that the Hasselblad 25mm f2.5v is a better option than the 28P for astrophotography, because it is a faster and wider lens.

However, I have heard somebody making the argument that with the new Hasselblad AI-based noise reduction the 28P becomes a viable options, which I'd tend to believe.

The 25mm is however known to have negligible coma WO. But what about the 28P? I have found no tests online about this problem. I did the quite unscientific test of pointing the camera tonight at far city lights and, just looking at the image preview on the back of the camera, I do not see any visible coma.

What is your experience?

Thank you

Are you interested only in a comparison to the 25 (which I don't have), or others too? I understand you own the 28P, so you could see for yourself whether you find the level of coma acceptable. It certainly has some - here's a 100% top-left crop from mine (very sloppy technique, but good enough to see the coma):



Here's an older post from Marianne Oelund comparing the coma of several lenses. I think it's a good start to finding out what level is acceptable to you.

https://www.dpreview.com/forums/post/62476241

- Chris

 

[PhotosFlight]

I've shot some astro with the X2D and 28P. I used them in Northern Minnesota and it required 3200 ISO and 10 seconds. If you really pixel peep the stars are not perfect but goodness, it is 100 megapixels. Oh, I did use the new phocus noise reduction and it worked well.

Without a doubt the 25 would be better. Are you willing to pay the price? I adapt a Canon EF 24-70 2.8 on the Hassie and that offers more speed if I want it.

 

[as1mov]

Many thanks for sharing your experience. I think I can start with the 28p and maybe later invest in the 25mm.

If you've got time please share your astro/night pictures, if possible with and without noise reduction.

Thanks again.

--
https://www.flickr.com/photos/149089857@N03/

 

[PhotosFlight]

Many thanks for sharing your experience. I think I can start with the 28p and maybe later invest in the 25mm.

If you've got time please share your astro/night pictures, if possible with and without noise reduction.

Thanks again.

Here you go.

This was shot on the X2D with the 28P at f4 for 10 seconds at ISO 3200.

They were processed with Phocus 2 on an iPad and I certainly applied the noise reduction along with some other adjustments to pull up the aurora which was not bright.

Also, it was -28 F (as in negative) out at the time so I would pop outside for no more than 2 minutes at a time to get shots. The camera electronics were slowing down.



I have done a lot more Astro work with the R6 and L glass than with the X2D. I can’t really make an assessment yet but the new Hasselblad noise reduction is a game changer.

Next week I go to Iceland with the 24-70 and the 28P. It will be interesting to see which one is on the Hassie more.



View attachment 00233fcf213843398e3f4be1d009b4e5.jpg



View attachment d2a1847e1b0d4da8b7eab35447b26e1d.jpg

 

[as1mov]

Many thanks.

To my eye, there is quite noticeable increasing coma going towards the left border of the picture (the right is covered by the tree in foreground). In the center the stars look more natural.

Cheers

 

[PhotosFlight]

Many thanks.

To my eye, there is quite noticeable increasing coma going towards the left border of the picture (the right is covered by the tree in foreground). In the center the stars look more natural.

Cheers